eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
111
116
article
Is it time to shed some light on the black box of health policies regarding the inhabitants of the high background radiation areas of Ramsar?
S.M.J. Mortazavi
mmortazavi@sums.ac.ir
1
H. Mozdarani
2
Although there are substantial experimental,
epidemiological and clinical evidences that high
doses of ionizing radiation cause cancer and other
detrimental biological effects, the health effects of
human exposure to chronic low dose radiation
exposures are still poorly known. People in some
areas around the world live in dwellings with radiation
and radon levels as much as more than 200 times
the global average. Inhabited areas with high levels of
natural radiation are found in different areas around
the world including Yangjiang, China Kerala, India
Guarapari, Brazil and Ramsar, Iran. Ramsar in
northern Iran is among the world’s well-known areas
with highest levels of natural radiation. Annual
exposure levels in areas with elevated levels of
natural radiation in Ramsar are up to 260 mGy y-1
and average exposure rates are about 10 mGy y-1 for
a population of about 2000 residents. Due to the
local geology, which includes high levels of radium in
rocks, soils, and groundwater, Ramsar residents are
also exposed to high levels of alpha activity in the
form of ingested radium and radium decay progeny
as well as very high radon levels in their dwellings.
Based on the findings obtained by studies on the
health effect of high levels of natural radiation in
Ramsar, as well as other high background radiation
areas, no consistent detrimental effect has been
detected so far. Further research is needed to clarify
if the regulatory authorities should set limiting
regulations to protect the inhabitants against such
extraordinary elevated levels of natural radiation.
Iran. J. Radiat. Res., 2012 10 (3‐4): 111‐116
http://ijrr.com/article-1-976-en.pdf
Ramsar
high background radiation areas (HBRAs)
natural radiation
radiation protection
regulatory authorities
health policies.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
117
122
article
Radioactivity of long lived gamma emitters in breakfast cereal consumed in Kuwait and estimates of annual effective doses
T. Alrefae
tareq.alrefae@ku.edu.kw
1
T.N. Nageswaran
2
T. Al-Shemali
3
Background: Breakfast cereal is a nutritious type
of food that is widely consumed by various age
groups in Kuwait. This study investigates the
presence of long-lived gamma emitters in breakfast
cereal, and estimates annual effective doses to
various age groups. Materials and Methods: Breakfast
cereal samples were collected from the Kuwaiti
local market. The samples originated from different
countries. After proper lab treatment, the samples
underwent gamma spectroscopy, where the targeted
radionuclides were 226Ra, 232Th, and 40K. Results:
While 40K was detected in all samples, 226Ra and
232Th were detected in most samples. The activity
concentration of each targeted radionuclide varied
from one sample to another. The annual effective
dose from consumption of breakfast cereal is
estimated to be 129, 185, and 351 μSv for the adult,
child, and infant age groups respectively. Conclusion:
The obtained activity concentrations are found to
agree with those reported in the literature. Moreover,
the estimated annual effective doses are found to be
safe. Iran. J. Radiat. Res., 2012 10(3‐4): 117‐122
http://ijrr.com/article-1-977-en.pdf
NORM
cereal
foodstuff
Kuwait.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
123
130
article
Standard edge detection algorithms versus conventional auto-contouring used for a three-dimensional rigid CT-CT matching
M. Mohammadi
mohammadi@umsha.ac.ir
1
Sh. Nabavi
2
Background: To reduce uncertainties of patient
positioning, the Computerized Tomography (CT)
images acquired at the treatment planning time can
be compared with those images obtained during
radiation dose delivery. This can be followed during
dose delivery procedure as Image Guided
radiotherapy (IGRT) to verify the prescribed radiation
dose delivery to the target as well as to monitor
radiation dose constraints for organ at risks located
in the vicinity of tumour region. A method was
developed to compare registered rigid CT images
with those acquired during treatment procedure.
Materials and Methods: Several CT images were
acquired for a typical Rando phantom at head and
neck region. Selecting the CT images as reference,
they were then manipulated in transitional and
rotational directions. The differences in transited and
rotated images were evaluated by edge detection
algorithms and conventional automatic contouring
used in most of current treatment planning systems.
Setting of standard edge detection algorithms was
investigated and the appropriate one was selected.
Applying the selected optimized standard edge
detection algorithm and conventional auto-contouring
on CT image differences, the characteristics of
methods were evaluated. Results: Results show that
1 pixel difference in transition and 1 degree in
rotation can be recognized for inhomogeneous
regions. A significant variation was detected at the
bony-soft tissue and air-soft tissue conjunction
regions. Conclusion: The results obtained from the
current study are comparable with those reported
using Chamfer algorithm. It is concluded that the
current method, can be used to control patient
positioning in radiotherapy sessions as a part of
Image guided radiotherapy protocols. Iran. J. Radiat.
Res., 2012 10(3‐4): 123‐130
http://ijrr.com/article-1-978-en.pdf
CT-CT matching
Edge detection algorithms
Image registration
Image guided Radiotherapy.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
131
138
article
Dosimetric comparison of whole breast radiotherapy using field in field and conformal radiotherapy techniques in early stage breast cancer
G. Yavas
guler.aydinyavas@gmail.com
1
C. Yavas
2
H. Acar
3
Background: We aimed to compare field-in-field
technique (FIF) with conformal tangential field radiotherapy
(CRT) in terms of dosimetric benefits for early
stage breast cancer radiotherapy. Materials and
Methods: Twenty consecutive left-side breast cancer
patients who underwent breast-conserving surgery
were included to the study. For each patient, two
different treatment plans were created for the entire
breast. FIF plans and CRT plans were compared for
doses in the planning target volume (PTV), the organ
at risk (OAR) volume including ipsilateral lung, heart,
left ascending coronary artery (LAD) and the
contralateral breast, the homogeneity index (HI), and
the monitor unit (MU) counts required for the
treatment. Paired samples t-test was used for
statistical analysis. Results: The FIF technique
significantly reduced the maximum dose of the PTV
as well as the mean doses of the heart, LAD,
ipsilateral lung and the contralateral breast (p values
were <0.001 for each). When the OAR volumes
irradiated with 2, 5, 10, 20, 30 and 40 Gy were
compared, the results were in favor of the FIF
technique. The volume receiving <20 Gy of the
prescription dose for the ipsilateral lung was
significantly decreased using FIF technique
(p<0.001). FIF technique allowed us more homogenous
dose distribution with lower MUs. Conclusion:
The FIF technique provided better dose distribution in
the PTV and significantly reduced the doses in the
OAR. Considering the lower MUs required for
treatment the FIF technique seems to be more
advantageous than CRT during whole breast
irradiation. Iran. J. Radiat. Res., 2012 10(3‐4): 131‐138
http://ijrr.com/article-1-979-en.pdf
Breast cancer
conformal radiotherapy
dose volume histograms
field-in-field technique.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
139
143
article
Patient effective dose evaluation for chest X-ray examination in three digital radiography centers
R. Paydar
paydar@razi.tums.ac.ir
1
A. Takavar
2
M.R. Kardan
3
A. Babakhani
4
M.R. Deevband
5
S. Saber
6
Background: The radiation doses resulting from
diagnostic X-ray examinations are routinely measured
in terms of entrance surface dose (ESD) and effective
dose (ED). In this study, for the purpose of radiation
protection, the radiation doses received from Digital
chest X-ray examination were evaluated in terms of
ESD and ED. Material and Methods: The ED was
calculated by using the MCNP Monte Carlo code and
an adult hermaphrodite mathematical phantom. The
effects of both operating high voltage and projection
geometry on the effective dose were investigated.
The absolute values of the ED were calculated for
digital and conventional Posterior-Anterior (PA) and
Lateral (LAT) projections of chest radiography.
Results: The results show ED for PA projection in
digital chest radiography in some major hospitals is
higher than National Diagnostic Reference Level
(NDRL). Conclusion: Therefore optimization process
should be considered seriously at national level to
reduce patient exposure in digital chest radiography
in Iran. Iran. J. Radiat. Res., 2012 10(3‐4): 139‐143
http://ijrr.com/article-1-980-en.pdf
Effective dose- chest X-ray - digital radiography-ED-ESD.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
145
150
article
Comparison of conventional and 3D conformal treatments using linac energies for prostate cancer
S.A. Vaezzadeh
avaezzadeh@razi.tums.ac.ir
1
M. Allahverdi
2
H.A. Nedaie
3
M. Aghili
4
M. Esfehani
5
Background: To evaluate the dosimetric difference
between conventional and three-dimensional
conformal Radiotherapy (3D-CRT) using 6 and 18 MV
X-ray photons. Materials and Methods: Computed
tomography scans of 26 pelvic patients were
acquired and transferred to the 3D treatment
planning system. For each patient, 8 Conventional
plans (3, 4, 5 and 6 Fields) and one 3D-CRT plan
were prepared using 6 and 18 MV photon energies.
The minimum dose (Dmin), maximum dose (Dmax) and
mean dose (Dmean) to target (PTV) and organs at risk
(OAR), Integral dose, Homogeneity Index and
Conformity Index were compared for each plan. Also,
Experimental measurements were performed using
farmer ionization chamber on a patient based pelvic
phantom. Results: On Average, six-field (6F1) plans,
offer minimum dose to critical organs and sufficient
dose to prostate. Increasing the beam energy lead to
a decrease in Dmean of the bladder and femoral
heads, as well as Dmax of PTV. The CI and ID were
decreased by 4% and 11% respectively with
increasing the energy and the number of beams.
Experimental measurements were also in good
agreement with calculations. 3D-CRT reduced Dmean
of bladder, rectum and femoral heads and also CI
and ID were significantly improved by 44.6% and
30.8%, respectively. Conclusion: Increasing the
photon energy and number of beams, improve the
treatment parameters of bladder, femoral heads and
PTV, except the rectum. 3D-CRT offered the most
conformity in the delivery doses to the prostate while
sparing dose to OARs, uninvolved structures with
lower integral dose. Iran. J. Radiat. Res., 2012 10(3‐4):
145‐150
http://ijrr.com/article-1-981-en.pdf
Conventional
3D-conformal radiotherapy
conformity index
integral dose
prostate cancer.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
151
156
article
Design of a generally applicable abdominal shield for reducing fetal dose during radiotherapy of common malignancies in pregnant patients
M. Atarod
1
P. Shokrani
Shokrani@med.mui.ac.ir
2
A. Pourmoghadas
3
Background: In most cancer cases, the treatment
choice for a pregnant patient is radiotherapy. In these
patients, the abdomen is usually not exposed
therefore fetus exposure is due to peripheral dose
(PD). The purpose of this study was to estimate the
fetal dose (the maximum PD in each pregnancy
stage) for modalities available and to fabricate and
evaluate a generally applicable fetal shield. Materials
and Methods: PD values were measured for brain,
breast and mediastinum irradiation in a whole body
anthropomorphic phantom using a NE 2571
ionization chamber. An external shield was then
designed to reduce the fetal dose to the standard
dose limit, 5 mSv. Results: The range of PD values as
a function of distance from the field’s edge were as
follows 1) 9.4-259 cGy for Mantel field 2) 6.5-95 cGy
for chest wall irradiation with 10 MeV electrons, 3)
8.5- 52.5 cGy for tangential field with Co-60 and 4)
4.8-7.8 cGy for brain radiotherapy with 9 MV photon.
PD values for the same setups using the fetal shield
were as follows: 1) 1.4-22 cGy, 2) 0.5-4 cGy, 3) 1.5-5
cGy and 4) under 1 cGy. Conclusions: The measured
PD data sets can be used to estimate fetal dose for
specific treatment setups and pregnancy stages. The
use of external shield designed in this research
reduced the fetal dose effectively to under the threshold
(a 70-90% reduction), except for the final stages
of pregnancy in Hodgkin’s patients. Iran. J. Radiat.
Res., 2012 10(3‐4): 151‐156
http://ijrr.com/article-1-982-en.pdf
Fetal Dose
radiotherapy
pregnancy
fetal shield.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
157
164
article
The comparison of absorbed dose measurements for water and artificial body fluid
T. Cakir
tcakir2003@yahoo.com
1
A. Gur
2
A. Arasoglu
3
Background: Advances in radiation dosimetry
concepts and the development of primary measurement
standards based on absorbed dose to water
over the last decades offer the possibility to calibrate
ionisation chambers directly in terms of absorbed
dose to water. The aim of this study is the investigation
on utility of artificial body fluid (ABF) instead of
water by comparing dosimetric measurements for
radiotherapy between water and ABF which is more
close to human tissue. Materials and Methods: The
measurements were done using 60Co gamma source
with a radiation field sizes of 5×5, 10×10, 15×15,
20×20 and 25×25 cm2 at PTW Freiburg MP3 water
phantom front surface. The comparisons of the dose
measurements were obtained by using IAEA TRS-398
dosimetry protocols and Mephysto mc2 dose analyzer
program. Percent depth dose (PDD), dose profiles
and penumbras are compared for water and ABF.
Results: When the results of the PDD for water and
ABF were compared, the maximum difference was
observed in big field sizes. The difference in
penumbras was found 2.3 mm averagely for depth of
maximum dose (dmax). In addition same differences
were observed between water and ABF when the
dose profiles were compared. It is found that PDD
values taken for water are good agreed with PDD
values published in British Journal of Radiology (BJR)
Supplement 25. Conclusion: Since the ABF is more
equivalent to human tissue than water, it is
suggested that advanced dosimetric studies should
be performed with ABF instead of water. Iran. J.
Radiat. Res., 2012 10(3‐4): 157‐164
http://ijrr.com/article-1-983-en.pdf
Radiation dosimetry
absorbed dose measurement
artificial body fluid.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
165
170
article
Short-term exposure to high levels of natural external gamma radiation does not induce survival adaptive response
S.M.J. Mortazavi
1
A. Niroomand-Rad
2
H. Mozdarani
mozdarh@modares.ac.ir
3
P. Roshan-Shomal
4
S.M.T. Razavi-Toosi
5
H. Zarghani
6
Background: In some areas of Ramsar, a city in
northern Iran, residents receive a much higher annual
radiation exposure than is permitted for radiation
workers. Induction of adaptive response in residents
of Ramsar has been reported previously. In this study
induction of such a response in short term exposure
to high background levels of gamma radiation is
investigated. Materials and Methods: Fifty male NMRI
mice were randomly divided into four groups of 10-17
animals and 53 Wistar rats were randomly divided
into five groups of 10-12 animals were studied.
Animals in the 1st group were kept for 7 days in an
outdoor area with normal background radiation while
the 2nd, 3rd, 4th and 5th (in case of rats) groups were
kept in 3 different outdoor areas with naturally
elevated levels of gamma radiation. Animals were
then exposed to a lethal dose of 8 Gy gamma
radiation. Results: For mice, 30 days after exposure
to lethal dose, the survival fraction for the control
group was 40% while the 2nd, 3rd, and 4th groups had
survival rates of 20%, 33.30%, and 35.20%,
respectively. For rats, 30 days after exposure to the
lethal dose, the survival fraction for the control group
was 40% while the 2nd, 3rd, 4th and 5th groups had
survival rates of 20%, 41.6%, 60.0% and 35.7%,
respectively. Conclusion: Results indicate that shortterm
exposure to extremely high levels of natural
gamma radiation (up to 196 times higher than the
normal background) do not lead to induction of
survival adaptive response. Iran. J. Radiat. Res., 2012
10(3‐4): 165‐170
http://ijrr.com/article-1-984-en.pdf
Ramsar
natural background radiation
survival adaptive response
short term exposure.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
171
175
article
Evaluation of 222Rn rate in medical dormitory of Kerman city
A.R. Montazerabadi
1
M. Ahmadian
2
M.R. Vahed
3
N. Yousefi
4
A. Fatehizadeh
5
P. Borhani
6
A. Rajabizadeh
7
A.R. Binesh
8
A. Shakerizadeh
9
A.H. Mahvi
ahmahvi@yahoo.com
10
Background: Radon (222Rn) Measurement in the
residential environments is very important because of
its effecting on human health and causing cancer in
the respiratory system. 222Rn is individually
responsible for half of the natural radiation received
in humans and influences on human by breathing.
Hence, this study was undertaken to access the 222Rn
level in the dormitories of Kerman university of
medical science (southeast of Iran) to ensure its
safety level. Materials and Methods: In this study, for
measuring 222Rn level in seven dormitories of the
Kerman University of Medical Sciences, the Lucas cell
technique was used. This study was undertaken
during the winter because of the high concentration
of radon in this season due to closed building
ambience. Results: In this study, the highest
measured radon gas rate was 24.5 Bq/m3 in Boustan
(1). Average concentrations of the radon gas in all
dormitories were 4.7 Bq/m3, which is lower than the
standard level. Conclusion: The results of this study
showed that the 222Rn level in all dormitories was
lower than the normal amount (48 Bq/m3) as well as
the standard level. Iran. J. Radiat. Res., 2012
10 (3‐4): 171‐175
http://ijrr.com/article-1-985-en.pdf
Radon gas
Medical Dormitory
Kerman
radioactive pollution
indoor air.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
177
181
article
Comparison of radiosensitizing effect of Resveratrol on monolayer and spheroid culture of DU145 prostatic cell line
M.S. Nezamtaheri
1
S. Khoei
2
A.R. Nikoofar
3
B. Goliaei
goliaei@ibb.ut.ac.ir
4
Background: Radiotherapy is an established
therapeutic modality for prostate cancer. Resveratrol,
a natural antioxidant, has been shown to inhibit
carcinogenesis and to block the process of tumor
initiation and progression. No data is available on the
response of cellular spheroid to Reseveratol. In this
study we have examined the effect of Resveratol on
the radiation response of human prostate cell line
DU145 in monolayer and spheroid cultures. Materials
and Methods: Radiosensitivity was assessed using
viability and colony formation assay. Apoptosis and
necrosis were assessed using acridine orange/
ethidium bromide double staining. Results: The
colony formation assay did not show any significant
radio-sensitizing effect, but apoptosis assay showed
significant radio-sensitizing effect of Resveratol on
DU145 cells grown as monolayer. In the spheroid
cells the results of apoptosis test were not significant
and corresponded closely to the result of survival
curve. Conclusion: While Resveratol could sensitize
DU145 cells in monolayer to ionizing radiation, it did
not have any effect on sensitivity of cells cultured in
spheroid cultures. Iran. J. Radiat. Res., 2012 10(3‐4):
177‐181
http://ijrr.com/article-1-986-en.pdf
Resveratrol
X-ray irradiation
multicellular spheroid
radioresistance
apoptosis.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
183
186
article
Megavoltage dose enhancement of gold nanoparticles for different geometric set-ups: Measurements and Monte Carlo simulation
S.H. Mousavie Anijdan
1
A. Shirazi
2
S.R. Mahdavi
srmahdavi@hotmail.com
3
A. Ezzati
4
B. Mofid
5
S. Khoei
6
M.A. Zarrinfard
7
Background: Gold nanoparticles (GNPs) have
been shown as a good radiosensitizer. In combination
with radiotherapy, several studies with orthovoltage
X-rays have shown considerable dose enhancement
effects. This paper reports the dose enhancement
factor (DEF) due to GNPs in 18 megavoltage (MV)
beams. Materials and Methods: Different geometrical
50-nm GNPs configurations at a concentration of 5
mg/ml were used by both experimental and Monte
Carlo (MC) simulation in a deep-seated tumor-like
insertion within a phantom. Using MCNP repeated
structure capability a large number of gold
nanospheres with a semi-random distribution were
applied to simulate this phantom based study.
Thermoluminescence dosimetries were used to verify
the process of irradiation and MC simulation. Results:
Under geometries with different probable combinations
of water and GNPs distribution in the tumor, the
percentage depth dose and DEF were calculated.
Incorporation of GNPs into the radiation field in our
set-ups showed a 12% DEF. Conclusion: We show
that the method of nanoparticles, distribution, and
orientation can effectively change the DEF value.
Iran. J. Radiat. Res., 2012 10(3‐4): 183‐186
http://ijrr.com/article-1-987-en.pdf
Monte Carlo simulation
gold nanoparticles (GNPs)
dose enhancement.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
187
191
article
Measurement of solar ultraviolet radiation in Yazd, Iran
F. Bouzarjomehri
bouzarj_44@ssu.ac.ir
1
V. Tsapaki
2
Background: Ultraviolet (UV) radiation is divided
into three regions: UVA, UVB, and UVC. Both the quality
and quantity of solar UV radiation vary with various
factors including the elevation of the sun above the
horizon, as well as absorption and scattering of UV
photons by molecules in the atmosphere, notably
ozone and clouds. It is clear that whereas a moderate
amount of UV exposure is beneficial, too much is
detrimental, so there is a need to quantify variations
of solar UV on the earth surface, at different time
intervals. Materials and Methods: The measurement
of solar UV radiation in Yazd city was achieved by two
radiometers: 1) a special UVA light meter with
maximum sensitivity to 365nm in the range of 320-
390nm and 2) a radiometer with a probe for 280-320
nm in UVB radiation. Measurement duration was from
1st January to the end of December 2008 and from
sunrise to sunset, every one hour. Results: Daily
integral UVA radiation in December with the lowest
(0.38×105Jm-2) and July with the highest intensity
(5.26×105Jm-2) were found. The minimum and
maximum monthly UVA radiation on the ground level
of Yazd city were 25.8×105Jm-2 in December
and 128.7×105Jm-2 in July, respectively.
Conclusion: Based on UVB /UVA ratio the UVB
intensity at 12 o'clock is 25 times lower than the UVA.
Therefore, the integrated hourly UVB in this time is
equal to 3.13 kjm-2 and almost the effective UVB is
1.56 kJm-2 so the minimum required exposure time of
UVB radiation for one SDD and MED by hands and
head are about 22 and 110 minutes respectively.
Iran. J. Radiat. Res., 2012 10(3‐4): 187‐191
http://ijrr.com/article-1-988-en.pdf
UVA
UVB
solar UV
radiometer
Yazd
broadband meter.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
193
196
article
Measurements of indoor radon, thoron and their progeny in Farrukhabad city of Uttar Pradesh, India
D. Verma
dpkapd@gmail.com
1
M. Shakir Khan
2
M. Zubair
3
Background: More than 50% of the total dose
received by human beings from all sources of
radiation (both from natural and manmade) comes
from radon and its progeny which is responsible for
lung cancer in many cases. Materials and Methods:
In the present study, the measurements have been
carried out by using twin chamber dosimeter cups
with LR-115 type-II detectors. The value of track
density of detectors gives the concentration of radon,
thoron and their progeny in different modes. Results:
The average value of radon and thoron concentration
was found 59 and 28 Bq/m3, respectively. The
inhalation dose was found to vary from 1.6 to 2.9
mSv/y. The average value of PAEC for radon and
thoron was found 6.4 mWL and 0.75 mWL, respectively.
Total annual exposure and annual effective
dose varies from 0.23 to 0.39 WLM and 0.87 to 1.51
mSv/y respectively. The values of life time fatality risk
was found to vary from 0.68 x 10-4 to 1.18 x 10-4.
Conclusion: These measurements show that the
radon/thoron concentrations and annual effective
dose received by the population of the area are well
below the action level recommended by the
International Commission on Radiological Protection
(ICRP). Iran. J. Radiat. Res., 2012 10(3‐4): 193‐196
http://ijrr.com/article-1-989-en.pdf
Radioactivity
twin chamber dosimeter
track density
inhalation dose.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
197
199
article
A rare presentation of osteoid osteoma in a rib and unexpected "double density sign": A case report and review of literature
E. Pirayesh
elahe_pirayesh@yahoo.com
1
M. Amoui
2
Osteoid osteoma (OO) is a relatively common
skeletal neoplasm, frequently involves long bones.
OO of rib is extremely rare, including 0.23-2% of OO
cases. Most of them arose in posterior arc,
frequently in its head or neck and might lead to
painful scoliosis. Involvement of anterior aspect of a
rib is extremely rare. Skeletal scintigraphy is highly
sensitive for detection of OO. “Double density sign" a
typical pattern in bone scintigraphy is usually seen in
OO of cortical bones. The current study presents a
case of 22-year-old man with OO in anterior arc of a
rib, revealed double density sign on 99mTc-MDP
scan. Iran. J. Radiat. Res., 2012 10(3‐4): 197‐199
http://ijrr.com/article-1-990-en.pdf
Osteoid osteoma
rib neoplasms
bone scintigraphy.
eng
Dr. Hossein Mozdarani
International Journal of Radiation Research
2322-3243
2345-4229
2012-12
10
3
201
203
article
Letter to editor
H.R. Khosravi
hkhosravi@aeoi.org.ir
1
Dear Prof. Mozdarani,I would like to discuss about some important aspects regarding the article published in,
"Iran. J. Radiat. Res., 2012 10(2): 89-94“ with title of “Patient doses from X-ray computed
tomography examinations by a single-array detector unit: Axial versus spiral mode" by
Ghavami et al. (1), so according to journal policy and in suitable manner please ask the
authors to reply to the comments.
http://ijrr.com/article-1-991-en.pdf