Trade-off between breast dose and image quality using composite bismuth shields in computed tomography: A phantom study

被引:2
作者
Mehnati, Parinaz [1 ]
Malekzadeh, Reza [1 ]
Hussein, Hussein Ali [2 ]
Obaid, Noor H. [3 ]
Ebrahimiyan, Saadat [4 ]
Sooteh, Mohammad Yousefi [1 ]
Refahi, Soheila [5 ]
机构
[1] Tabriz Univ Med Sci, Sch Med, Dept Med Phys, Tabriz, Iran
[2] Al Ayen Univ, Sci Res Ctr, Thi Qar, Iraq
[3] Al Mustaqbal Univ Coll, Anesthesia Tech Dept, Babylon, Iraq
[4] Gonabad Univ Med Sci, Sch Med, Dept Med Phys & Radiol, Gonabad, Iran
[5] Ardabil Univ Med Sci, Sch Med, Dept Med Phys, Ardebil, Iran
关键词
Nano-composite; Computed tomography; Dose reduction; Image quality; Breast imaging; CT; REDUCTION; RADIOLOGY;
D O I
10.1016/j.jmir.2022.12.005
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Introduction: Many researchers have suggested that bismuth com-posite shields (BCS) reduce breast dose remarkably; however, the level of this reduction and its impact on image quality has not been assessed. This study aimed to evaluate the efficiency of nano-and micro-BCS in reducing the dose and image quality during chest computed tomog-raphy (CT) scans.Materials and methods: Bismuth shields composed of 15 weight-ing percentage (wt%) and 20 wt% bismuth oxide (Bi2O3) nano -and micro-particles mixed in silicon rubber polymer were constructed in 1 and 1.5 mm thicknesses. The physical properties of nanoparti-cles were assessed using a scanning electron microscope (SEM), X-ray diffraction (XRD), and energy-dispersive X-ray (EDX). Breast ra-diation doses were measured experimentally during chest CT using PMMA standard dosimetry phantom (body phantom, 76-419-4150, Fluke Biomedical) in the presence of the shields. The image quality was assessed by calculating signal and noise values in different regions.Results: The SEM images showed that the average size of Bi2O3 nano -and micro-particles was about 70 nm and 150 mu m, respectively. The breast doses were reduced by increasing the shield thickness/bismuth weight percentage. The maximum dose reduction was related to the20% weight of Bi2O3 nano-particles and a thickness of 1.5 mm. The minimum dose reduction was related to the 15% weight of Bi2O3 micro-particles with a thickness of 1 mm. The mean noise was higher in nano-particle bismuth shields than in micro-particles.Conclusion: Composite shields containing bismuth nano-and micro-particles can reduce the breast dose during chest CT exami-nations while negatively impacting diagnostic image quality. Several critical factors, such as bismuth concentration, particle size, and shield thickness, directly affect the efficiency.
引用
收藏
页码:145 / 152
页数:8
相关论文
共 36 条
[1]   Study on Z dependence of partial and total mass attenuation coefficients [J].
Akkurt, I ;
Mavi, B ;
Akkurt, A ;
Basyigit, C ;
Kilincarslan, S ;
Yalim, HA .
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, 2005, 94 (3-4) :379-385
[2]  
[Anonymous], 2002, QUAL CONTR DIAGN RAD
[3]   Computed Tomography (CT) Imaging Features of Patients with COVID-19: Systematic Review and Meta-Analysis [J].
Awulachew, Ephrem ;
Diriba, Kuma ;
Anja, Asrat ;
Getu, Eyob ;
Belayneh, Firehiwot .
RADIOLOGY RESEARCH AND PRACTICE, 2020, 2020
[4]  
Banaei A., 2018, J KERMAN U MED SCI, V25, P471
[5]   Region of interest (ROI) computed tomography [J].
Chityala, R ;
Hoffmann, KR ;
Bednarek, DR ;
Rudin, S .
MEDICAL IMAGING 2004: PHYSICS OF MEDICAL IMAGING, PTS 1 AND 2, 2004, 5368 :534-541
[6]  
Colombo Paola, 2004, Radiol Med, V108, P560
[7]   STRATEGY OF COMPUTED TOMOGRAPHY IMAGE OPTIMISATION IN CERVICAL VERTEBRAE AND NECK SOFT TISSUE IN EMERGENCY PATIENTS [J].
Davoudi, Mohammad ;
Khoramian, Daryoush ;
Abedi-Firouzjah, Razzagh ;
Ataei, Gholamreza .
RADIATION PROTECTION DOSIMETRY, 2019, 187 (01) :98-102
[8]   Effect of bismuth breast shielding on radiation dose and image quality in coronary CT angiography [J].
Einstein, Andrew J. ;
Elliston, Carl D. ;
Groves, Daniel W. ;
Cheng, Bin ;
Wolff, Steven D. ;
Pearson, Gregory D. N. ;
Peters, M. Robert ;
Johnson, Lynne L. ;
Bokhari, Sabahat ;
Johnson, Gary W. ;
Bhatia, Ketan ;
Pozniakoff, Theodore ;
Brenner, David J. .
JOURNAL OF NUCLEAR CARDIOLOGY, 2012, 19 (01) :100-108
[9]   Compatibility tests on steels in molten lead and lead-bismuth [J].
Fazio, C ;
Benamati, G ;
Martini, C ;
Palombarini, G .
JOURNAL OF NUCLEAR MATERIALS, 2001, 296 :243-248
[10]   The use of breast shielding for dose reduction in pediatric CT: arguments against the proposition [J].
Geleijns, Jacob ;
Wang, Jia ;
McCollough, Cynthia .
PEDIATRIC RADIOLOGY, 2010, 40 (11) :1744-1747