| Yuan Zilong,Liu Tao,Zhang Biao,Chen Tiao,Li Cuiling,Zhang Zhaoxi,Wu Lei.Evaluation of selected photon shield and organ-based tube current modulation for organ dose reduction and image quality in head CT for infants: a phantom study[J].Chinese Journal of Radiological Medicine and Protection,2022,42(3):225-229 |
| Evaluation of selected photon shield and organ-based tube current modulation for organ dose reduction and image quality in head CT for infants: a phantom study |
| Received:October 08, 2021 |
| DOI：10.3760/cma.j.cn112271-20211008-00405 |
| KeyWords:Selected photon shield Organ-based tube current modulation Radiation dose Eye lens Computed tomography |
| FundProject:福建省肿瘤放射与免疫治疗临床医学研究中心（2020Y2012） |
| Author Name | Affiliation | E-mail | | Yuan Zilong | Department of Clinical Medicine, Medical College, Wuhan University of Science and Technology, Wuhan, 430065, China | | | Liu Tao | Department of Radiology, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430079, China | | | Zhang Biao | Department of Radiology, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430079, China | | | Chen Tiao | Department of Radiology, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430079, China | | | Li Cuiling | Department of Radiological Health, Wuhan Hospital for the Prevention and Treatment of Occupational Disease, Wuhan 430015, China | | | Zhang Zhaoxi | Department of Radiology, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430079, China | | | Wu Lei | Department of Clinical Medicine, Medical College, Wuhan University of Science and Technology, Wuhan, 430065, China | wulei@wust.edu.cn |
|
| Hits: 1688 |
| Download times: 664 |
| Abstract:: |
| Objective To compare the dose and image quality of selected photon shield (SPS) technique, organ-based tube current modulation (OBTCM) technique and the combination of these two techniques for reducing the organ dose in head CT examination for infants. Methods Two anthropomorphic head phantoms (CIRS 1-yr-old and 5-yr-old) were scanned by using Reference mode, Reference + OBTCM mode, SPS mode and SPS + OBTCM mode, respectively. Radiation doses to the lens of the eye, the anterior of the brain, the posterior of the brain, noise level and CNR of orbit and brain in different phantoms were measured and compared by using different scanning modes. Results Compared with Reference mode, the doses to the lens of the eye in 1-yr-old and 5-yr-old phantom decreased by (21.89±0.01)% and (28.33±0.34)%, respectively. In SPS mode, the reduction in doses to the lens of the eye in 1-yr-old and 5-yr-old phantom were (71.38±1.30)% and (53.72±2.42)%, respectively. In SPS + OBTCM mode, the reduction was (71.12±2.54)% and (55.73±1.90)%, respectively. There was significant difference in the noise level of orbit and brain in different phantoms under various scanning modes (F=5.67-85.47, P<0.05). The noise level in OBTCM mode compared with reference mode increased slightly (<1.45 HU) in various phantoms. SPS and SPS + OBTCM mode resulted in a small noise increase (<2.58 HU). There was no significant difference in CNR of different phantoms under various scanning modes (P>0.05). SPS and SPS + OBTCM mode can significantly reduce the radiation dose of lens and the whole image plane in the head CT scan for infants, with maintaining the image quality. |
| HTML View Full Text View/Add Comment Download reader |
| Close |
|
|
|
