RSNA2013「オススメ演題」について
隈丸（國島）加奈子先生（ハーバードメディカルスクール・ブリガムアンドウィメンズ病院）にお答えいただきました。
【CT・心エコー】
CODE:SSA04-01
Scientific Formal (Paper) Presentations
Value of Echocardiography in Patients with Acute Pulmonary Embolism with a Normal CT-derived Right-to-Left Ventricular Diameter Ratio
Kanako K. Kumamaru MD, PhD, et al.
DATE: Sunday, December 1st 2013
TIME: 10:45 – 10:55 AM
LOCATION: S404CD
PURPOSE:
Decision criteria for subsequent transthoracic echocardiography (TTE) after acute pulmonary embolism (PE) are needed when the CT-derived right-to-left ventricular (RV/LV) diameter ratio does not suggest RV dysfunction. The purpose of this study is to develop a clinical prediction rule for low probability of incremental prognostic benefit from subsequent TTE after acute PE.
〈コメント〉
CT上で右室拡大がない肺塞栓患者に心エコーは施行すべきかどうか、モデルを立て議論しています。
【CT】
CODE:SSA19-04
Scientific Formal (Paper) Presentations
Automated Axial Right Ventricle to Left Ventricle Diameter Ratio Computation in Computed Tomography Pulmonary Angiography (CTPA)
German Gonzalez PhD, et al.
DATE: Sunday, December 1st 2013
TIME: 11:15 – 11:25 AM
LOCATION: S403B
PURPOSE:
The RV/LV diameter ratio is a proven metric of prognosis in patients with CT pulmonary angiography (CTPA) findings of acute pulmonary embolism (PE). The purpose of this report is to introduce and test, using radiologist and clinical outcomes reference standards, a completely automated algorithm to output the right ventricular to left ventricular (RV/LV) diameter ratio from CTPA images.
〈コメント〉
MITとBWHが共同で開発した、造影CT画像を用いて両心室最大径を自動で測定するアルゴリズムの紹介です。
【CT】
CODE:SSA02-09
Scientific Formal (Paper) Presentations
CT Coronary Artery Opacification Gradients Using Different Iodinated Contrast Injection Protocols
Dimitris Mitsouras PhD, et al.
DATE: Sunday, December 1st 2013
TIME: 12:05 – 12:15 PM
LOCATION: S502AB
PURPOSE:
To evaluate differences in coronary contrast opacification gradients, also known as TAG or Transluminal Attenuation Gradients, between biphasic and triphasic coronary CTA injection protocols.
〈コメント〉
冠病変評価の新たなMetricとして注目されている、冠動脈内の造影勾配（opacification gradients）は、インジェクションプロトコルの違いでどのように変化するのかを評価しています。
【MR】
CODE:CL-MIE-SU5A
Education Exhibits
Vein Graft Implantable Contrast Initiative: Enhanced Vessel Wall Imaging
Oscar R Miranda, et al.
DATE: Sunday, December 1st 2013
TIME: 12:30 – 1:00 PM
LOCATION: S503AB
PURPOSE/AIM:
To describe the current and potential role of molecular imaging approaches for enhancing the magnetic resonance (MR) properties of vascular tissues.
〈コメント〉
血管壁に結合するMR造影剤を用いて正常血管壁と異常血管壁（内皮の肥厚等）を見分ける方法に関する、興味深いレビューです。
【CT】
CODE:LL-CAE-SU8B
Education Exhibits
Multidetector Computed Tomography (MDCT) Imaging of Coronary Artery Fistulas: Pictorial Review
Sachin S Saboo FRCR, MD, et al.
DATE: Sunday, December 1st 2013
TIME: 1:00 – 1:30 PM
LOCATION: NA
PURPOSE/AIM:
Review clinical presentations and coronary artery anatomy on MDCT applicable to patients with coronary artery fistulas (CAF)
Review the MDCT appearance of various CAF
Discuss clinical implications of MDCT based information in the management of patients with CAF
〈コメント〉
冠動脈瘻をCT画像でどのように評価するかをまとめた、包括的なレビューです。
【CT】
CODE:LL-PHS-MO2B
Scientific Informal (Poster) Presentations
The Effects of Pure and Hybrid Iterative Reconstruction Techniques on Computer-aided Detection (CAD) System of Pulmonary Nodules in Dose-reduced CT Scans
Masaki Katsura MD, et al.
DATE: Monday, December 2nd 2013
TIME: 12:45 – 1:15 PM
LOCATION: Lakeside Learning Center
PURPOSE:
To evaluate the effects of pure and hybrid iterative reconstruction techniques on computer-aided detection (CAD) system of pulmonary nodules using reference-, low-, and ultralow-dose chest CT.
〈コメント〉
肺結節のコンピュータ支援診断（Computer-aided Detection ：CAD）における、逐次近似再構成法及び低線量の影響を評価しています。
【Informatics】
CODE:ICII23
Refresher/Informatics
3-D Printing: Bridging the Gap between Theory and Practice
Frank J. Rybikci MD, PhD
DATE: Monday, December 2nd 2013
TIME: 2:30 – 4:00 PM
LOCATION: S501ABC
Learning Objects:
1) To understand the potential role of 3D printing in clinical practice. 2) To learn an algorithm for preparing volumetric CT images for 3D printing applications. 3) To learn the basics of 3D printing, including materials and formats. 4) To show illustrative examples of 3D printing, such as in surgical planning and for cardiac analyses.
〈コメント〉
現在話題の3Dプリンターを、手術前のプランニングなど、放射線画像を用いて臨床現場へ応用する方法を紹介するリフレッシャーコースです。
【Informatics】
CODE:VSIN31-10
Scientific Formal (Paper) Presentations
Natural Language Processing of CT Pulmonary Angiography Reports for the Detection of Pulmonary Embolism Chronicity and Location of Filling Defects
Sheng Yu, et al.
DATE: Tuesday, December 3rd 2013
TIME: 11:05 – 11:15 AM
LOCATION: S502AB
PURPOSE:
To develop and test a Natural Language Processing (NLP) algorithm that analyzes clinical reports of CT Pulmonary Angiography (CTPA) for the diagnoses of pulmonary embolism (PE), the chronicity of PE when present, and the location of the most proximal filling defect considered positive for PE.
〈コメント〉
自然言語処理（Natural Language Processing）の放射線レポートへの応用もホットな分野の一つ。肺塞栓CTのレポートを、自然言語処理を用いて細かく分類するアルゴリズムの紹介です。
【Informatics】
CODE:LL-HPS-WE1B
Scientific Informal (Poster) Presentations
Communication of Acute Findings on Imaging Examinations: Quality and Performance Assessment in the Emergency Department
Amir Imanzadeh MD, et al.
DATE: Wednesday, December 4th 2013
TIME: 12:45 – 1:15 PM
LOCATION: Lakeside Learning Center
PURPOSE:
To evaluate the quality, performance, and accurate documentation of communication of acute findings with referring physicians by radiologists in the emergency department.
〈コメント〉
緊急検査における放射線科医と臨床医のコミュニケーションと、その内容のレポートへの記載に関して評価した報告です。
【MR】
CODE:SSM14-04
Scientific Formal (Paper) Presentations
Measurement of Mean Axon Diameter of Posterior Limb of Internal Capsule in Patients with Idiopathic Normal Pressure Hydrocephalus before and after Lumboperitoneal Shunt
Masaaki Hori MD, et al.
DATE: Wednesday, December 4th 2013
TIME: 3:30 – 3:40 PM
LOCATION: N226
PURPOSE:
Prospective estimation of mean axon diameter and extra-axonal space of the posterior limb of internal capsule (PLIC) in patients with idiopathic normal pressure hydrocephalus (NPH) before and after lumboperitoneal (LP) shunt by using q-space diffusion analysis.
〈コメント〉
LPシャントが施行され歩行が改善した正常圧水頭症例群で、術前後の内包後脚のextra-axonal spaceのサイズに変化が見られたという報告です。
【CT】
CODE:VSVA51-04
Scientific Formal (Paper) Presentations
CT Angiography of the Chest and Abdomen: Image Quality, Interobserver Variability, and Diagnostic Accuracy for Iterative versus Filtered Back Projection Reconstruction
Elizabeth George MBBS, et al.
DATE: Thursday, December 5th 2013
TIME: 9:15 – 9:25 AM
LOCATION: S502AB
PURPOSE:
To test the hypothesis that CT angiography (CTA) images reconstructed with iterative method (AIDR3D) have superior image quality, lower interobserver variability in anatomical measurements, and higher diagnostic accuracy when compared to the same raw data reconstructed with filtered back projection (FBP).
〈コメント〉
3Dの逐次近似再構成法（Adaptive Iterative Dose Reduction 3D: AIDR 3D）を、胸部・腹部のCTA画像に幅広く応用した場合の画質や測定誤差などに関する報告です。
【CT】
CODE:VSCH51-09
Scientific Formal (Paper) Presentations
Incidental Findings Detection on CT Pulmonary Angiography Images with Low kVp Techniques
Kanako K. Kumamaru MD, PhD, et al.
DATE: Thursday, December 5th 2013
TIME: 10:30 – 10:40 AM
LOCATION: E351
PURPOSE:
To evaluate the effect of reduced kVp on detection of incidental findings in the lungs and mediastinum in patients who underwent CT Pulmonary Angiography (CTPA) for suspected acute pulmonary embolism.
〈コメント〉
肺塞栓用CTに低管電圧を用いた場合、増加したノイズは肺野や縦隔の評価を邪魔しないのか、という疑問について検討しています。
【CT】
CODE:SST09-01
Scientific Formal (Paper) Presentations
Vascular Communications between Donor and Recipient Tissues One Year after Successful Full Face Transplantation
Kanako K. Kumamaru MD, PhD, et al.
DATE: Friday, December 6th 2013
TIME: 10:30 – 10:40 AM
LOCATION: N226
PURPOSE:
To noninvasively study vascular changes that have implications on graft survival and rejection, future surgical planning, and our understanding of the underlying biology changes after full face transplantation.
〈コメント〉
顔面移植後のドナー・レシピエントの動静脈を、CT画像を用いて解析しています。
【マルチモダリティ】
CODE:LL-MKE2088
Education Exhibits
Upper Extremity Composite Tissue Allotransplantation Imaging
Elizabeth George MBBS, et al.
PURPOSE:
Background and Purpose: Upper extremity (UE) amputation has extraordinary costs; patients require significant lifestyle modification. UE Transplantation (UET) has been successfully explored. Imaging is fundamental to positive outcomes; there is a new and unmet need to describe and standardize protocols for both surgical planning, follow-up, and imaging UET patients with complications. This exhibit draws on the success of a multidisciplinary allograft restoration service to review UET imaging.
AIMS:
1. Review strategies for uniform surgical planning and post-operative imaging in UET.
2. Describe imaging protocols and post-processing methods for catheterization, CT, standard and custom MR sequences, and clinical plus high frequency sonography.
3. Demonstrate imaging findings after successful UET.
4. Describe future directions in UET imaging.
〈コメント〉
上肢移植の術前・術後画像についての発表です。
