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1 Arts and Sciences 13D FASE MRCP The usability of Single breath-hold MRCP 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% Table 1 7cm 20cm PVA 1 Table 1 scan parameters of 3D and 2D T MRI EXCELART Vantage 8ch TORSO SPEEDER coil Yasuyuki ohtsuka Department of Radiological Technology Taoka Hospital vol.62 no.758

Fig.1 changes of image quality by TR Pre sub. Post sub.

1-3 TRTE TR 3D-MRCPTable 1 TE 350 TR 1600 2500 Fig.

2 2D 3D 22 MIP SNR signal noise ratio CNR contrast noise

7 Wilcoxon 1 23 4 5 5 SNR CNR 2 1-4 SNR CNR Fig.

2 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 Fig.1 TR TE D-MRCP 3D TE Fig.2 2D 3D 22 MIP SNR signal noise ratio CNR contrast noise ratio Wilcoxon SNR CNR 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 TR SNR TR

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.

3 CNR TR TR 2000 Fig.5 Wilcoxon TR Table TR TE SNR CNR TR 2000 TE TE SNR TE Fig.6a CNR TE Fig.6b Wilcoxon TE 250 TE Table D 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 vol.62 no.758

4 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

5 spin echo HASTE fast advanced spin echo FASE Single shot fast spin echo SSFSE 2D thick slice MRCP D-MRCP 2D-PACE ERCP 1 22 T2 T2-PLUS 7 fast recovery 8 T2-blur 1 O 2 CT 3 5 / 30 9, 10, 11 3 / 22 2D thick slice MRCP SN 12 MRCP T1 T2 13 FSE MRCP SSFP 5 13D-MRCP 2D thick slice MRCP MRCP 1 Fig.1 TR Fig.2 TE 2D 3D Fig.3 SNR Fig.4 CNR Fig.5 TR SNR, CNR Fig.6 TE SNR, CNR2D 3D a. SNRb. CNR Fig.7 a. b. Fig.8 a. b. Fig.9 a. b. Table 1 2D 3D MRCP Table 2 TR Table 3 TE 1 2D-PACEMRCP., vol.61, , parallel MRI SNR., vol.64, , MRI CNR., vol.60, , Wallner B et al.: Dilated biliary tract. Evalution with MR cholangiography with a T2-weighted contrast enhanced fast sequence. Radigraphy, vol.181, , Morimoto K et al.: Biliary obstruction. evalution with three-dimensional MR cholangiography. Radiography. vol.183, , MRCP., vol.2, , T2Plus 3D-MR cholangiography., vol.61, , Fast Recovery Single Shot Fast Spin Echo MR cholangiography., vol.58, , , vol.61, , CT., vol.53, , MDCT CABG.., vol.13, 61-64, MRI., vol.36, , MRCP. 12, vol.30, , vol.62 no.758

06_学術_関節単純X線画像における_1c_梅木様.indd

06_学術_関節単純X線画像における_1c_梅木様.indd Arts and Sciences X The formulation of femoral heard measurement corrected enlargement ratio using hip joints X-ray Imaging 1 2 1 1 1 2 Key words: Bipolar Hip Arthroplasty (BHA) Preoperative planning Enlargement