Iterative Metallic Artifact Reduction for In-Plane Gonadal Shielding During Computed Tomographic Venography of Young Males

作者：Choi Jin Woo; Lee Sang Yub; Kim Jong Hyo; Jin Hyeongmin; Lee Jaewon; Choi Young Hun; Lee Hyeon-Kyeong; Park Jae Hyung^*

来源：Journal of Computer Assisted Tomography, 2018, 42(2): 269-276.

DOI：10.1097/RCT.0000000000000670

• computed tomography
• radiation dose
• gonadal shield
• iterative metallic artifact reduction

Objective The purpose of this study was to evaluate a gonadal shield (GS) and iterative metallic artifact reduction (IMAR) during computed tomography scans, regarding the image quality and radiation dose.
Methods A phantom was imaged with and without a GS. Prospectively enrolled, young male patients underwent lower extremity computed tomography venography (precontrast imaging without the GS and postcontrast imaging with the GS). Radiation dose was measured each time, and the GS-applied images were reconstructed by weighted filtered back projection and IMAR.
Results In the phantom study, image artifacts were significantly reduced by using IMAR (P = 0.031), whereas the GS reduced the radiation dose by 61.3%. In the clinical study (n = 29), IMAR mitigated artifacts from the GS, thus 96.6% of the IMAR image sets were clinically usable. Gonadal shielding reduced the radiation dose to the testes by 69.0%.
Conclusions The GS in conjunction with IMAR significantly reduced the radiation dose to the testes while maintaining the image quality.

• 出版日期2018-4