Arts and Sciences 13D FASE MRCP The usability of Single breath-hold MRCP 33883 Key words: fast advanced spin echo FASE. magnetic resonance cholangiopancreato-graphy MRCP. single breath-hold. Summary When the respiratory-gate is finished in failure in the routine 3D-MRCP, we have verified using a self-made phantom whether get diagnosable images more easily and in single breath-hold also whether it is possible to clinical application as the alternative. Even single breath-hold MRCP, it is possible to image the trunk of the left and right intrahepatic bile duct common bile duct pancreatic duct and we can get diagnosable sufficient images. However drawbacks are that the imaging area is limited, the image quality is easily influenced by the contents of the bile duct. Single breath-hold MRCP is very useful clinically in any event, so we think it will be the alternative of the routine 3D MRCP in case of trouble. 3D-MRCP1 1MRCP 1MRCP3D-MRCP MRCP 2D 3D 2D-PACE motion artifact 1 1 3D-FASE MRCP1 10ml1 PVA10% 1-2 30 Table 1 7cm 20cm PVA 1 Table 1 scan parameters of 3D and 2D 1-1 1.5T MRI EXCELART Vantage 8ch TORSO SPEEDER coil Yasuyuki ohtsuka 33883 Department of Radiological Technology Taoka Hospital 22 1410 2015. vol.62 no.758
Fig.1 changes of image quality by TR Pre sub. Post sub. Fig.3 measurement of SNR Fig.4 measurement of CNR 3 04 Fig.2 changes of image quality by TE comparison of 2D and 3D 1-3 TRTE TR 3D-MRCPTable 1 TE 350 TR 1600 2500 Fig.1 TR TE 250 500 2D-MRCP 3D TE 250 500 Fig.2 2D 3D 22 MIP SNR signal noise ratio CNR contrast noise ratio 6 18.7 Wilcoxon 1 23 4 5 5 SNR CNR 2 1-4 SNR CNR Fig.35 ROI ROI S ROI ROI Nsub SNR 2D ROI 3D 7 mm 7 mm 49 2D 9 mm 7 mm 49 Fig.3 Fig.4 3 ROI ROI Sin Sout Sair CNR 2D ROI 3D 1.0 cm 1.0 cm 100 2D 1.3 cm 1.0 cm 100 Fig.4 2 2-1 TR SNR TR 1600 2000 23 1411
2000 2500 CNR TR TR 2000 Fig.5 Wilcoxon TR 1600 1800 2000 2500 Table 2 2-4 TR TE SNR CNR TR 2000 TE 350 22 3 3 2-2 TE SNR TE 250 500 25 Fig.6a CNR TE 250 400 350 400 400 500 Fig.6b Wilcoxon TE 250 TE 300 350 400 Table 3 2-3 2D 3D SNR CNR 3D Fig.2 6a 6b 3-1 MRCP Fig.7a 1 Fig.7b MRCP 3-2 MRCP debris IPMN Fig.8a 8b 3 / Table 2 optical evaluation about TR the result of Wilcoxon rank sum test Table 3 optical evaluation about TE the result of Wilcoxon rank sum test Fig.5 changes of SNR and CNR by TR a changes of SNR by TE b changes of CNR by TE Fig.6 changes of SNR and CNR by TE comparison of 3D and 2D 24 1412 2015. vol.62 no.758
速 報 1回息止め3D FASE MRCPの有用性 学 術 Arts and Sciences scan time = 5min. scan time = 22sec. Fig.7 CASE ① 04 scan time = 5min. scan time = 22sec. Fig.8 CASE ② scan time = 4.5min. scan time = 23sec. Fig.9 CASE ③ 3-3 症例③ 再発した総胆管および肝内胆管結石の精査目的で MRCP を実施した 肝内胆管左枝および総胆管内 の結石 拡張した肝内胆管が明瞭に描出できている Fig.9a 9b 酸素 3ℓ/ 分吸入下で撮像を実施した 4 考察 MRCP は 1991 年に Wallner ら Morimoto らに よって steady state free procession SSFP を用 いた手法として初めて報告された 4, 5 空間分解能が 悪く 拡張した膵胆管しか描出できなかった その後 MR 装置の進歩 コイルおよび収集シーケンスの改良 により half-fourier acquisition single-shot turbo 学 術 25 1413
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