Abstract
Intravenous urography (IVU) and CT urography (CTU) are efficient radiological examinations for the evaluation of the urinary system disorders. However patients are exposed to a significant radiation dose. The objectives of this study are to: (i) measure and compare patient radiation dose by computed tomography urography (CTU) and conventional intravenous urography (IVU) and (ii) evaluate organ equivalent dose and cancer risks from CTU and IVU imaging procedures. A total of 141 patients were investigated. A calibrated CT machine (Siemens-Somatom Emotion duo) was used for CTU, while a Shimadzu X ray machine was used for IVU. Thermoluminescence dosimeters (TLD-GR200A) were used to measure patients' entrance surface doses (ESD). TLDs were calibrated under reproducible reference conditions. Patients radiation dose values (DLP) for CTU were 172±61mGycm, CTDIvol 4.75±2mGy and effective dose 2.58±1mSv. Patient cancer probabilities were estimated to be 1.4 per million per CTU examination. Patients ESDs values for IVU were 21.62±5mGy, effective dose 1.79±1mSv. CT involves a higher effective dose than IVU. In this study the radiation dose is considered low compared to previous studies. The effective dose from CTU procedures was 30% higher compared to IVU procedures. Wide dose variation between patient doses suggests that optimization is not fulfilled yet.
| Original language | English |
|---|---|
| Pages (from-to) | 154-157 |
| Number of pages | 4 |
| Journal | Radiation Physics and Chemistry |
| Volume | 104 |
| DOIs | |
| Publication status | Published - 2014 |
Fingerprint
Keywords
- CTU
- Effective dose
- IVU
- Radiation exposure
- Radiation risk
- Thermoluminescence dosimeters
ASJC Scopus subject areas
- Radiation
Cite this
Effective dose estimation during conventional and CT urography. / Alzimami, K.; Sulieman, A.; Omer, E.; Suliman, I. I.; Alsafi, K.
In: Radiation Physics and Chemistry, Vol. 104, 2014, p. 154-157.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effective dose estimation during conventional and CT urography
AU - Alzimami, K.
AU - Sulieman, A.
AU - Omer, E.
AU - Suliman, I. I.
AU - Alsafi, K.
PY - 2014
Y1 - 2014
N2 - Intravenous urography (IVU) and CT urography (CTU) are efficient radiological examinations for the evaluation of the urinary system disorders. However patients are exposed to a significant radiation dose. The objectives of this study are to: (i) measure and compare patient radiation dose by computed tomography urography (CTU) and conventional intravenous urography (IVU) and (ii) evaluate organ equivalent dose and cancer risks from CTU and IVU imaging procedures. A total of 141 patients were investigated. A calibrated CT machine (Siemens-Somatom Emotion duo) was used for CTU, while a Shimadzu X ray machine was used for IVU. Thermoluminescence dosimeters (TLD-GR200A) were used to measure patients' entrance surface doses (ESD). TLDs were calibrated under reproducible reference conditions. Patients radiation dose values (DLP) for CTU were 172±61mGycm, CTDIvol 4.75±2mGy and effective dose 2.58±1mSv. Patient cancer probabilities were estimated to be 1.4 per million per CTU examination. Patients ESDs values for IVU were 21.62±5mGy, effective dose 1.79±1mSv. CT involves a higher effective dose than IVU. In this study the radiation dose is considered low compared to previous studies. The effective dose from CTU procedures was 30% higher compared to IVU procedures. Wide dose variation between patient doses suggests that optimization is not fulfilled yet.
AB - Intravenous urography (IVU) and CT urography (CTU) are efficient radiological examinations for the evaluation of the urinary system disorders. However patients are exposed to a significant radiation dose. The objectives of this study are to: (i) measure and compare patient radiation dose by computed tomography urography (CTU) and conventional intravenous urography (IVU) and (ii) evaluate organ equivalent dose and cancer risks from CTU and IVU imaging procedures. A total of 141 patients were investigated. A calibrated CT machine (Siemens-Somatom Emotion duo) was used for CTU, while a Shimadzu X ray machine was used for IVU. Thermoluminescence dosimeters (TLD-GR200A) were used to measure patients' entrance surface doses (ESD). TLDs were calibrated under reproducible reference conditions. Patients radiation dose values (DLP) for CTU were 172±61mGycm, CTDIvol 4.75±2mGy and effective dose 2.58±1mSv. Patient cancer probabilities were estimated to be 1.4 per million per CTU examination. Patients ESDs values for IVU were 21.62±5mGy, effective dose 1.79±1mSv. CT involves a higher effective dose than IVU. In this study the radiation dose is considered low compared to previous studies. The effective dose from CTU procedures was 30% higher compared to IVU procedures. Wide dose variation between patient doses suggests that optimization is not fulfilled yet.
KW - CTU
KW - Effective dose
KW - IVU
KW - Radiation exposure
KW - Radiation risk
KW - Thermoluminescence dosimeters
UR - http://www.scopus.com/inward/record.url?scp=84905995334&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84905995334&partnerID=8YFLogxK
U2 - 10.1016/j.radphyschem.2013.11.023
DO - 10.1016/j.radphyschem.2013.11.023
M3 - Article
AN - SCOPUS:84905995334
VL - 104
SP - 154
EP - 157
JO - Radiation Physics and Chemistry
JF - Radiation Physics and Chemistry
SN - 0969-806X
ER -