【私のイチオシ！】RSNA2011注目の演題：木口雅夫先生(広島大学病院)

【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。

木口雅夫先生(広島大学病院診療支援部高次医用画像部門)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: SSA02-05
SESSION: Cardiac (Coronary CT/MR Angiography)
Diagnostic Accuracy of Computed Tomography Coronary Angiography (64-slice) in Women with Low, Intermediate, and High Risk for Coronary Artery Disease
Anoeshka Dharampal MD et al
DATE: Sunday, November 27 2011
TIME: 11:25 AM – 11:35 AM
LOCATION: S502AB
●PURPOSE
The aim of this study was to determine the diagnostic accuracy of CT coronary angiography (CTCA) in women with low, intermediate and high risk of having significant coronary artery disease (CAD).

CODE: SSA20-04
SESSION: Physics (CT Dose Modulation)
Volume-of-Interest Imaging for High Image Quality at Reduced Dose in Dedicated Female Breast CT
Daniel Kolditz et al
DATE: Sunday, November 27 2011
TIME: 11:15 AM – 11:25 AM
LOCATION: S404AB
●PURPOSE
Generally, the complete breast cross-section is scanned in breast CT to avoid truncation artifacts in the reconstructed images. The aim of this study was to develop and evaluate a volume-of-interest (VOI) approach to increase image quality for a sub-volume at reduced total dose.

CODE: SSC02-02
SESSION: Cardiac (Myocardial Perfusion)
Dynamic CT Perfusion Imaging of the Myocardium Using a Wide Detector CT Scanner: A Semi-Quantitative Analysis in an Animal Model
Daniela Muenzel MD et al
DATE: Monday, November 28 2011
TIME: 10:40 AM – 10:50 AM
LOCATION: S503AB
●PURPOSE
To evaluate the feasibility of CT dynamic myocardial perfusion imaging (MPI) at a wide detector computed tomography scanner in an animal model with complete coverage of the myocardium.

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: SSC02-07
SESSION: Cardiac (Myocardial Perfusion)
Quantification of Myocardial Perfusion with Adenosine Stress High-Pitch 128 Dual-Source CT: Validation of a New Software Prototype
Tobias De Zordo MD et al
DATE: Monday, November 28 2011
TIME: 11:30 AM – 11:40 AM 
LOCATION: S503AB
●PURPOSE
to validate quantification of adenosine myocardial stress perfusion using high-pitch 128-dual source CT with a new prototype software, using adenosine stress cardiac magnetic resonance (CMR) as reference method.

CODE: SSG02-03
SESSION: ISP: Cardiac (Dual-Energy CT)
Comparison of Dynamic Myocardial Perfusion CT and Dual-Energy Myocardial Perfusion CT Imaging in the Evaluation of Acute Chest Pain
Markus Weininger MD et al
DATE: Tuesday, November 29 2011
TIME: 10:50 AM – 11:00 AM
LOCATION: S503AB
●PURPOSE
Latest advancements in technology suggest the feasibility of cardiac CT for the comprehensive assessment of all aspects of coronary artery disease. We describe our initial experience applying myocardial perfusion CT in a clinical population with acute chest pain.

CODE: SSG02-05
SESSION: ISP: Cardiac (Dual-Energy CT)
Dual-Energy CT Myocardial Perfusion: Comparison of Raw Hounsfield Unit Attenuation Ratio to Dual-Energy Iodine Concentration for the Evaluation of Coronary Stenosis Hemodynamic Significance
Rohan Poulter MBBS et al
DATE: Tuesday, November 29 2011
TIME: 11:10 AM – 11:20 AM
LOCATION: S503AB
●PURPOSE
Using rest and stress contrast enhanced dual energy cardiac CT (DECT) we assessed myocardial perfusion distal to coronary stenosis using raw Hounsfield Unit (HU) attenuation and dual energy iodine concentration.

CODE: SSG02-06
SESSION: ISP: Cardiac (Dual-Energy CT)
Dual-Energy CT for the Differentiation of Coronary Atherosclerotic Plaques in an ex Vivo Study
Florian Glaser-Gallion MD et al
DATE: Tuesday, November 29 2011
TIME: 11:20 AM – 11:30 AM
LOCATION: S503AB
●PURPOSE
To evaluate the performance of CT attenuation at different tube voltages and dual-energy CT to differentiate lipid-rich, fibrotic, and calcified coronary atherosclerotic plaques.

CODE: SSG02-08
SESSION: ISP: Cardiac (Dual-Energy CT)
Dual-Energy vs Single-Energy CT for the Detection of Myocardial Perfusion Defects: An Intraindividual Comparison
Garrett Rowe BS et al
DATE: Tuesday, November 29 2011
TIME: 11:40 AM – 11:50 AM
LOCATION: S503AB
●PURPOSE
Myocardial perfusion defects (PDs) by CT are thought to become more conspicuous on spectral images like those derived from dual-energy CT (DECT), but the two techniques have not been systematically compared in the same patients. We investigated whether DECT improves the detection of PDs compared to single-energy dual-source CT (DSCT) in a group of patients who were studied with both techniques.

CODE: SSG02-09
SESSION: ISP: Cardiac (Dual-Energy CT)
Impact of CT Spectral Imaging on Artery Stent Assessment: A Different Stent Size Phantom Study
Shuai Zhang et al
DATE: Tuesday, November 29 2011
TIME: 11:50 AM – 12:00 PM
LOCATION: S503AB
●PURPOSE
Monochromic images could be generated by CT gemstone spectral imaging (GSI) with fast kVp switching dual energy system, so that artery stent assessment can benefit from high keV images with greatly reduced beam hardening artifacts and blooming artifact. In this study, we analyzed difference in the measured in-stent luminal diameter (ISLA) of different size of stent between monochromic images and 140kVp images

CODE: SSG14-01
SESSION: Physics (CT Cardiac)
Coronary CT Angiography: Image Quality, Diagnostic Accuracy, and Potential for Radiation Dose Reduction Using a Novel Iterative Image Reconstruction Technique—Comparison with Traditional Filtered Back Projection
Antonio Moscariello MD et al
DATE: Tuesday, November 29 2011
TIME: 10:30 AM – 10:40 AM
LOCATION: S403B
●PURPOSE
To compare image noise, image quality and diagnostic accuracy of coronary CT angiography (cCTA) using a novel iterative reconstruction algorithm versus traditional filtered back projection (FBP) and to estimate the potential for radiation dose savings.

CODE: SSG14-03
SESSION: Physics (CT Cardiac)
Deconvolution-based Quantitative Myocardial Perfusion Measurement with Extra Low Dose CT Myocardial Perfusion Imaging
Aaron So PhD et al
DATE: Tuesday, November 29 2011
TIME: 10:50 AM – 11:00 AM
LOCATION: S403B
●PURPOSE
We investigated the use of adaptive statistical iterative reconstruction (ASIR) and Smart Smooth (SS) (GE Healthcare, (GE)) and Principal Component Analysis (PCA) for minimizing image noise in low dose CT myocardial perfusion imaging (MPI).

CODE: SSG14-09
SESSION: Physics (CT Cardiac)
Measurement Accuracy for Coronary Artery Calcium Scoring Using Iterative Reconstruction Method
Keishi Ogura et al
DATE: Tuesday, November 29 2011
TIME: 11:50 AM – 12:00 PM
LOCATION: S403B
●PURPOSE
This study aims to investigate the effect of iterative reconstruction on calcium scoring.

CODE: SSG15-05
SESSION: ISP: Physics (CT Dose)
Lumen Contrast Enhancement Influence on Non-calcified Atherosclerotic Plaque CT Visualization
Wisnumurti Kristanto MSC et al
DATE: Tuesday, November 29 2011
TIME: 11:10 AM – 11:20 AM
LOCATION: S404AB
●PURPOSE
Previous studies reported the ability of computed tomography (CT) to characterize plaque composition based on their Hounsfield Unit (HU) values. However, it was also reported that HU values of non-calcified plaques were heavily influenced by the lumen contrast-enhancement. This study aimed to evaluate this influence by using software simulation of coronary CT angiography.

CODE: SSG17-03
SESSION: Vascular/Interventional (CT Angiography Dose Reduction, Vessel Wall Imaging, and Visceral MR Angiography)
Automatic kV Selection for Radiation Dose Reduction in CT Angiography
Lifeng Yu PhD et al
DATE: Tuesday, November 29 2011
TIME: 10:50 AM – 11:00 AM
LOCATION: E353A
●PURPOSE
Lower kV has a great potential to reduce radiation dose in CT; however, its practical implementation has been hampered by lack of quantitative tools to guide the selection of proper kV and mAs for each patient. Our goal is to assess a novel automatic kV selection tool in reducing radiation dose while maintaining diagnostic quality in CT angiography (CTA).

CODE: LL-PHS-TU12A
SESSION: Physics
Improved Image Quality and Reduced Radiation Dose in Chest CT Using Model-based Iterative Reconstruction: Phantom Experiment
Isao Tanaka et al
DATE: Tuesday, November 29 2011
TIME: 12:15 PM – 12:45 PM
LOCATION: Lakeside Learning Center
●PURPOSE
 To investigate in a phantom the utility of model-based iterative reconstruction (MBIR) to improve image quality and reduce radiation dose in chest CT.

CODE: SSJ04-05
SESSION: Cardiac (MR Imaging and CT: Contrast Agents and Interventions)
Low Contrast and Low Radiation Dose Protocol in Cardiac CT at 256-Row CT: Usefulness of Low Tube Voltage and iDose Reconstruction Algorism
Takeshi Nakaura MD et al
DATE: Tuesday, November 29 2011
TIME: 03:40 PM – 03:50 PM
LOCATION: S503AB
●PURPOSE
It has been suggested that low tube voltage scanning allows reducing the radiation- and contrast dose, and that the iterative reconstruction algorithm improves image quality at low tube voltage scanning. We evaluated the feasibility of a low contrast-, low radiation dose protocol at cardiac CT using 80 kVp and “hybrid iterative reconstruction algorithm (iDose)” at 256-row CT scanner.

CODE: SSC16-04 
SESSION: ISP: Physics (Multienergy CT)
Performance Comparison: A Tabletop Photon Counting X-ray Detector CT System vs Clinical Dual-Energy X-ray CT
Jochen Cammin PhD et al
DATE: Monday, November 28 2011
TIME: 11:00 AM – 11:10 AM
LOCATION: S403B
●PURPOSE
To compare the performance of a tabletop photon counting x-ray detector CT system (PCXD-CT) with a clinical dual energy CT system (DECT).

CODE: SSC16-05
SESSION: ISP: Physics (Multienergy CT)
Effectiveness of Synthesized Monochromatic Imaging Generated with a Fast Kilovoltage Switching Dual-Energy CT Scanner for Improving Patient-to-Patient Uniformity of Aortic Enhancement during Abdominal CT Angiography
Daniele Marin MD et al
DATE: Monday, November 28 2011
TIME: 11:10 AM – 11:20 AM
LOCATION: S403B
●PURPOSE
To test the hypothesis that synthesized monochromatic imaging generated from a fast kilovoltage switching dual energy CT acquisition may correct for beam hardening artifacts, yielding uniform aortic enhancement across different body sizes.