Abstract
This study assessed the ability of various types of topograms, when used with an automatic tube current modulation (ATCM) technique, to reduce radiation dose from computed tomography (CT) scans. Three types of topograms were used with the ATCM technique: (i) anteroposterior (AP) topograms alone, (ii) AP topograms followed by lateral topograms, and (iii) lateral topograms followed by AP topograms. Various regions (chest, abdomen and whole-body) of a humanoid phantom were scanned at several tube voltages (80, 100 and 120 kVp) with the selected topograms. Although the CT dose depended on the order of topograms, the CT dose with respect to patient positioning depended on the number of topograms performed. The magnitude of the difference in CT dose between number and order of topograms was greater for the scans of the abdomen than the chest. These results suggest that, for the Siemens SOMATOM Definition AS CT scanner, choosing the right combination of CT scan conditions with the ATCM technique can minimize radiation dose to a patient.
| Original language | English |
|---|---|
| Article number | T09003 |
| Journal | Journal of Instrumentation |
| Volume | 12 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2017 Sep 22 |
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Keywords
- Computerized Tomography (CT) and Computed Radiography (CR)
- Radiation calculations
ASJC Scopus subject areas
- Instrumentation
- Mathematical Physics
Cite this
Effect of topogram-tube angle combination on CT radiation dose reduction. / Shim, J.; Yoon, Myonggeun.
In: Journal of Instrumentation, Vol. 12, No. 9, T09003, 22.09.2017.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of topogram-tube angle combination on CT radiation dose reduction
AU - Shim, J.
AU - Yoon, Myonggeun
PY - 2017/9/22
Y1 - 2017/9/22
N2 - This study assessed the ability of various types of topograms, when used with an automatic tube current modulation (ATCM) technique, to reduce radiation dose from computed tomography (CT) scans. Three types of topograms were used with the ATCM technique: (i) anteroposterior (AP) topograms alone, (ii) AP topograms followed by lateral topograms, and (iii) lateral topograms followed by AP topograms. Various regions (chest, abdomen and whole-body) of a humanoid phantom were scanned at several tube voltages (80, 100 and 120 kVp) with the selected topograms. Although the CT dose depended on the order of topograms, the CT dose with respect to patient positioning depended on the number of topograms performed. The magnitude of the difference in CT dose between number and order of topograms was greater for the scans of the abdomen than the chest. These results suggest that, for the Siemens SOMATOM Definition AS CT scanner, choosing the right combination of CT scan conditions with the ATCM technique can minimize radiation dose to a patient.
AB - This study assessed the ability of various types of topograms, when used with an automatic tube current modulation (ATCM) technique, to reduce radiation dose from computed tomography (CT) scans. Three types of topograms were used with the ATCM technique: (i) anteroposterior (AP) topograms alone, (ii) AP topograms followed by lateral topograms, and (iii) lateral topograms followed by AP topograms. Various regions (chest, abdomen and whole-body) of a humanoid phantom were scanned at several tube voltages (80, 100 and 120 kVp) with the selected topograms. Although the CT dose depended on the order of topograms, the CT dose with respect to patient positioning depended on the number of topograms performed. The magnitude of the difference in CT dose between number and order of topograms was greater for the scans of the abdomen than the chest. These results suggest that, for the Siemens SOMATOM Definition AS CT scanner, choosing the right combination of CT scan conditions with the ATCM technique can minimize radiation dose to a patient.
KW - Computerized Tomography (CT) and Computed Radiography (CR)
KW - Radiation calculations
UR - http://www.scopus.com/inward/record.url?scp=85031036697&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85031036697&partnerID=8YFLogxK
U2 - 10.1088/1748-0221/12/09/T09003
DO - 10.1088/1748-0221/12/09/T09003
M3 - Article
VL - 12
JO - Journal of Instrumentation
JF - Journal of Instrumentation
SN - 1748-0221
IS - 9
M1 - T09003
ER -