【私のイチオシ！】RSNA2011注目の演題：舛田隆則先生(土谷総合病院)

【私のイチオシ！】コーナーでは、先生方が注目する面白そうなセッションや口演・ポスター発表等についてご紹介します。

舛田隆則先生(土谷総合病院)が注目するセッションはこちらです!

CODE: SSA02-03
SESSION: Cardiac (Coronary CT/MR Angiography)
Quantitative Evaluation of Coronary In-Stent Restenoses with Gemstone High Definition CT in Comparison with Quantitative Coronary Angiography and Intravascular Ultrasound: Preliminary Results
Daniele Andreini MD et al
DATE: Sunday, November 27 2011
TIME: 11:05 AM – 11:15 AM
LOCATION: S502AB
●PURPOSE
Purpose: The assessment of coronary stents with present-generation 64-detector row computed tomography scanners that use filtered backprojection and operating at standard definition of 0.5–0.75 mm (standard definition, SDCT) is limited by imaging artifacts and noise. We evaluated the performance of a novel, high-definition 64-slice CT scanner (HDCT), with improved spatial resolution (0.23 mm) and applied statistical iterative reconstruction (ASIR) for the diagnosis of coronary in-stent restenosis (ISR) in comparison with the performance of SDCT. The gold standard was defined by quantitative coronary angiography and intravascular ultrasound (IVUS).

CODE: SSA05-08
SESSION: Emergency Radiology (CT in the Emergency Room: Current Concepts)
Experimental Study between Different Illicit Drugs in Vitro and in a Porcine Model Using Dual-Energy CT (SICT)
Michael Scherr MD et al
DATE: Sunday, November 27 2011
TIME: 11:55 AM – 12:05 PM
LOCATION: N227
●PURPOSE
To evaluate in vitro and in a porcine model the differentiability between different substances in packages containing illicit drugs via Dual Energy CT.

CODE: SSA08-02
SESSION: Gastrointestinal (Advanced Abdominal CT Technique: kVp and Iodine)
Virtual Nonenhanced Image of the Upper Abdomen Using a Fast kV Switching Dual-Energy CT: Comparison with True Nonenhanced CT
Atsushi Nakamoto MD et al
DATE: Sunday, November 27 2011
TIME: 10:55 AM – 11:05 AM
LOCATION: E450B
●PURPOSE
To evaluate the utility of virtual nonenhanced image (VNEI) of the upper abdomen obtained by using a fast kV switching dual energy CT.

CODE: SSA23-04
SESSION: Vascular/Interventional (Aortic Endografts and Related Issues in the IR Suite)
Improved Detection of Endoleaks after Endovascular Therapy for Abdominal Aortic Aneurysms with Monochromatic Images (keV) from Multispectral CT
Daniella Pinho MD et al
DATE: Sunday, November 27 2011
TIME: 11:15 AM – 11:25 AM
LOCATION: E350
●PURPOSE
To assess the diagnostic performance of different monochromatic reconstructions from single-source (SS) dual energy (DE) CT angiography in the detection of endoleaks after endovascular therapy for abdominal aortic aneurysms (AAA), compared to standard single energy (SE) CT angiography. 

CODE: SSC01-05
SESSION: Cardiac (Myocardial Infarction)
Delayed Enhancement Imaging of Myocardial Viability: Low-Dose High-Pitch CT vs MRI
Robert Paul Götti et al
DATE: Monday, November 28 2011
TIME: 11:10 AM – 11:20 AM
LOCATION: S502AB
●PURPOSE
To evaluate the diagnostic accuracy of delayed enhancement (DE) CT in the high-pitch mode for the diagnosis of myocardial infarction (MI) and assessment of myocardial viability with MR as the standard of reference.

CODE: SSC02-03
SESSION: Cardiac (Myocardial Perfusion)
Comparison of the Defects of Adenosine Stress and Rest Dynamic 256-Slice CT Myocardial Perfusion and MRI
Luo Hai-Ying et al
DATE: Monday, November 28 2011
TIME: 10:50 AM – 11:00 AM
LOCATION: S503AB
●PURPOSE
This study sought to evaluate the feasibility a protocol for adenosine-induced stress and rest dynamic myocardial perfusion imaging (MPI) with 256-slice computed tomography (CT), and to assess the ability of CT-MPI to detect abnormal flow reserve and infarction in comparison with magnetic resonance imaging (MRI).

CODE: SSC02-08
SESSION: Cardiac (Myocardial Perfusion)
Adenosine Stress Myocardial Perfusion Scan Using 128 Slice Dual-Source CT: Dynamic Enhancement Patterns of Normal and Abnormal Myocardium and Proposal of Optimized Dynamic Perfusion CT Protocol
Sung Mok Kim MD et al
DATE: Monday, November 28 2011
TIME: 11:40 AM – 11:50 AM
LOCATION: S503AB
●PURPOSE
The purpose of this study were to evaluate myocardial enhancement patterns on dynamic adenosine-stress CT and to discuss on optimized dynamic stress CT protocol for reduction of radiation dose using 128-slice dual-source computed tomography (DSCT).

CODE: SSE20-02
SESSION: Pediatrics (Sedation: Utilization)
Pediatric Thoracic CT Angiography: Comparison of Imaging Quality between General Anesthesia and No Anesthesia in Infants and Young Children
Keira Mason MD et al
DATE: Monday, November 28 2011
TIME: 03:10 PM – 03:20 PM
LOCATION: S102AB
●PURPOSE
Thoracic CT angiography (CTA) requires infants and young children to remain motionless, usually either with a general anesthetic (GA) or on their own without adjuvant medication (non GA). This study compared the quality of non GA and GA thoracic CTA images in children under 5 years of age with 64 MDCT.

CODE: SSG14-06
SESSION: Physics (CT Cardiac)
SIMULATE LEFT VENTRICLE MOTION: DESIGN AND DEVELOPMENT OF A PULSATING CARDIAC PHANTOM WITH A TWIST MECHANISM
Huizhi Cao et al
DATE: Tuesday, November 29 2011
TIME: 11:20 AM – 11:30 AM
LOCATION: S403B
●PURPOSE
The pulsating cardiac phantom is a useful tool for evaluation image quality of cardiac applications. The current cardiac phantom only moves in 2D (X-Y) dimensions, but real Left Ventricle (LV) motion is in 4D dimensions (X, Y, Z and twist motion). The purpose of this paper is to demonstrate the design and fabrication of new pulsating cardiac phantom with a twist mechanism to simulate real LV motion.

CODE: LL-CAE2377
MYOCARDIAL PERFUSION ON MDCT
Tanche Wang MSc 
LUNCHTIME CME:
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: Lakeside Learning Center
●SUMMARY
1.Cardiac perfusion imaging with MDCT adds value to cardiac CT in the detection of significant coronary artery disease
2.DECT cardiac imaging with adenosine or regadenoson may provide a comprehensive assessment of coronary anatomy and myocardial perfusion under stress
3.Creation of perfused blood volume iodine maps using DECT can demonstrate identify areas of ischemic cardiac tissue

CODE: LL-PDE4320 
Update of Dose Reduction Strategies during 64-Detector Pediatric Cardiac CT Imaging
Takanori Masuda
LUNCHTIME CME:
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: S101AB
●SUMMARY
1. Imaging filters provide lower doses for patients at high reliability.

2. The use of low kV technique provides dose reduction by use of the CNR technique.

3. High helical pitch ECG-gated scan provides dose reduction but depends on the patient’s heart rate.

4. The mA modulation and step and shoot scan allows for the lowest dose, but suffers from inconsistency image quality. These techniques depend on the patient’s heart rate.

CODE: LL-PDE4335 
Chest CT Findings in H1N1 Influenza: A Viral Infection in Children
Hidefumi Fujisawa MD
LUNCHTIME CME:
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: S101AB
●SUMMARY
The major teaching points of this exhibit are:

1. H1N1 influenza A virus cased more severe bronchopulmonary lesions than did seasonal influenza virus

2. The most common CT findings were consolidation with some airway abnormalities.

3. The extensive involvement of consolidation and nodule opacity with a mucous plug was associated with an adverse outcome, particularly plastic bronchitis.

CODE: LL-PHE4431 
Optimal Use of Automatic Exposure Control in Contrast-enhanced CT: How to Achieve a Further Low Dose Examination in Clinical Practice
Hiroo Murasaki
LUNCHTIME CME:
EXHIBIT HOURS: Sun. 8:00 AM – 6:00 PM
Mon. – Thurs. 7:00 AM – 10:00 PM
Fri. 7:00 AM – 12:45 PM
LOCATION: Lakeside Learning Center
●SUMMARY
The major teaching points of this exhibit are:
1. At the same tube voltage, image noise of enhanced abdominal CT images increases by 10-15 % than that of non-enhanced images when the same noise level is set with AEC technique.
2. Image contrast for 100 kV is 25% higher than that for 120 kV.
3. In consideration of noise level and contrast variation at the different tube voltages, optimal use of AEC in contrast-enhanced CT enables radiation reduction by up to 30% with keeping lesion detectability.

CODE: LL-CHS-SU7A
SESSION: Chest
Dose Reduction, Image Quality, and Diagnostic Acceptance in CT: Use of an Automatic Dose Control System with Adequate Noise Characteristic
Patrick Stumpp MD, PhD et al
DATE: Sunday, November 27 2011
TIME: 12:30 PM – 01:00 PM 
LOCATION: Lakeside Learning Center
●PURPOSE
To study the effect of an adequate noise ADC system, characterized by a more gentle adaptation of exposure settings to body size, on the individual perception of image noise and diagnostic acceptance by radiologists in comparison to objectively measured image noise as well as the dose reductions achieved in a representative group of patients.