第39回CT画像研究会 Q&A回答 - osaka-ctken.net

1 39 CT Q&A CT 25 11 2 Questions Q1. CT Q1-1. Q1-2. Q1-3. Q1-4. VR, CPR, MIP Q1-5. Q1-6. Q1-7. 5 A TOSHIBA aquilion 64 60 380 B TOSHIBA aquilion ONE(320) 75 850 C TOSHIBA aquilion CX(64) 100 350 D SIEMENS Sensation 64 50 300 E PHILIPS Brilliance iCT(256) 200 300 Q1. CT Q1-1. 3 MIP 3 4AV4PD 2 CPR LAD LCX 2 4 CPR VR maximum intensity projection: MIP volume rendering: VR curved multi planer reconstruction: CPR MIP CPR Thin MIP cross-section Q1-1.

2 VR MIP CPR Thin MIP cross-section A T (64) 60 B T (320) 75 1 1 1 1 1 1 1 C T (64) 100 D S (64) 50 E P (256) 200 2 2 2 1 2 Q1-1. A T (64) 60 B T (320) 75 C T (64) 100 VR, CPR D S (64) 50 CPR, Thin MIP E P (256) 200 Q1-2. CPR VR Q1-3. A T (64) 60 B T (320) 75 C T (64) 100 D S (64) 50 E P (256) 200 Q1-3.

3 Q1- . VR, CPR, MIP excellent CABG (coronary artery bypass graft) A T (64) 60 30 60 100 B T (320) 75 30 30 60 60 C T (64) 100 10 15 30 40 D S (64) 50 20 30 30 E P (256) 200 20 30 40 60 Q1- . VR, CPR, MIP Q1-5. ASO A T (64) 60 B T (320) 75 C T (64) 100 D S (64) 50 2 100mL E P (256) 200 Q1-5.

4 : EX 43kg 350mgI 60ml 30ml 30ml 30ml 15ml 10sec 20sec 5sec A, E Q1-5. Gating Helical scan Helical scan Q1-5. A, E Q1-6. A T (64) 60 B T (320) 75 C T (64) 100 D S (64) 50 E P (256) 200 Q1-6. Q1-7. A T (64) 60 CT CT B T (320) 75 C T (64) 100 D S (64) 50 or E P (256) 200 CT Q1-7.

5 Questions Q2. D AIDR-STRONG Q2. (iterative reconstruction: IR) 1,2,3 M, Ota T, Tsukagoshi S, et al. New method of evaluating edge-preserving adaptive filters for computed tomography (CT): digital phantom method. Nihon Hoshasen Gijutsu Gakkai Zasshi 2006; 62(7): 971-978. Y, Hara AK, Pavlicek W, et al. Abdominal CT: comparison of low-dose CT with adaptive statistical iterative reconstruction and routine-dose CT with filtered back projection in 53 patients. AJR Am J Roentgenol 2010; 195(3): 713-719. A, Osemont B, Lecocq S, et al. CT image quality improvement using adaptive iterative dose reduction with wide-volume acquisition on 320-detector CT.

6 Eur Radiol 2012; 22(2): 295-301. Method Vender Strength AIDR3D TOSHIBA WEAK, MILD, STANDARD , STRONG SAFIRE SIEMENS Strength 1-5 iDose4 PHILIPS Level 1-6 ASiR GE Percentage 10-100% Q2. FBP IR L1 20 CT 2012; 68(12): 1631-1636 CT 2012; 68(12): 1624-1630. FBP L1 20 Questions Q3. CTO Q3.

7 ACCF/SCCT/ACR/AHA/ASE/ASNC/NASCI/SCAI/SC MR 2010 Appropriate Use Criteria for Cardiac Computed Tomography 400 appropriate 401 uncertain SCCT Q3. Perfusin image MSCT Image and Data Analysis 5min Plain CT imaging Measurement of Agtston score Adenosine Initiated MSCT imaging Adenosine Off Contrast media injection 50-80 ml of contrast media (350mg/ml) 24mgI/kg/sec during 12 seconds 30ml saline base mid apex mid Perfusion images CAG seg7 99% CTO MI MIP Questions Q4.

8 3 DMAP PCI CPR 3 DMAP Q4. Questions Q5. Q5. 75 CT Questions Q6. Q6. 2 ECG R Questions Q7.

9 Q7. HR Questions Q8. Q8. 70bpm 70bpm Questions Q9. Q9. Q9. , , , ECG edit MDCT (HP) 2008; 64(11): 1343-1351 Q9.

10 BP [ (N-1) / N ] Trot / (Trr+ Tq) N: Trot: (ms) Trr: 1 ms) Tq: (Trot 2/3ms) CT I/ / EF CT TDC Questions Q10. Q10. ( ) (HU) CT 250 300HU Becker C R,et al:Optimal contrast application for cardiac 4 detector row computed tomograhy. Invest Radial. 38:690-694,2003 50% 326HU Cademartiri F,et al:Higher intracoronary attenuation improves diagnostic accuracy in MDCT coronary angiography.