Japanese
TitleThallium-201心筋SPECTにおける2次元表示 (Bullet) 方法 - Polar Mapとの対比検討 -
Subtitle短報
Authors今井嘉門*, 安藤達夫*, 弓倉整*, 渡辺一郎*, 斎藤頴*, 小沢友紀雄*, 波多野道信*, 萩原和男**, 阿部博幸**, 鎌田力三郎**
Authors(kana)
Organization*日本大学医学部第二内科, **放射線科
Journal核医学
Volume24
Number6
Page865-869
Year/Month1987/6
Article報告
Publisher日本核医学会
Abstract「I. 目的」201Tl心筋シンチグラフィは非観血的に心筋の血流分布を把握できるため冠動脈疾患の診断にとって不可欠な検査方法のひとつである. 最近では, Planar像に加えてSPECT(Single photon emission computed tomography)による断層像を用いるようになった. SPECTで得られる3次元情報をTransaxial, Coronal, SagittalまたはTransverse, Short axis, Long axisの画像で表示したが, これら断面像を並べて見ると画像が多く煩雑であった. これらの多くの情報を理解しやすく表示するため, 1)同心円で層状に表示するPolar map, 2)左室を長方形に展開して表示するInfarct map, 3)横軸に左室短軸の各スライスの円周, 縦軸に心長軸をとり帯状に配列した展開図等のいくつかの試みがある.
Practice臨床医学：一般
KeywordsSPECT, Infarct area, Thallium-201, Cardiac functional display, Polar map.
English
TitleTwo-Dimensional Representation (Bullet) Method of the Thallium-201 Myocardial SPECT ; Comparison with Polar Map
Subtitle
AuthorsKamon IMAI*, Tatsuo ANDO*, Sei YUMIKURA*, Ichiro WATANABE*, Satoshi SAITO*, Yukio OZAWA*, Michinobu HATANO*, Kazuo HAGIWARA**, Hiroyuki ABE**, Rikisaburo KAMATA**
Authors(kana)
Organization*Department of Second Internal Medicine, **Department of Radiology, Nihon University School of Medicine
JournalThe Japanese Journal of nuclear medicine
Volume24
Number6
Page865-869
Year/Month1987/6
ArticleReport
PublisherTHE JAPANESE SOCIETY OF NUCLEAR MEDICINE
Abstract[Summary]Tl-201 SPECT has given a three-dimensional information of myocardial infarct. The location and extension are shown by Polar map namely "bull's eye" method. Is the rate of displayed infarct area accurate? The purpose of this study is to determine the accuracy of infarct area and to explain the infarct size more precisely by using anew method of "Bullet". The heart was divided into six slices in short axis, then measured by circumferential analysis such as 60 measuring points in each slice, and apical two slices were defined as apical layers, basal two were basal layers and middle two slices were basal layers. The infarct zone was defined as a perfusion defect in which Tl-201 uptake was below 20% of normal lower limit. The results were displayed as concentric circle. The layers from center to peripheral were apical, middle and basal. The patients were divided into three groups: Apical group that infarct was distributed dominantly in apical two layers (5%>others). A basal group that infarct was dominant in basal. Even group that infarct was equally distributed in apical, middle and basal layers. The rate of infarct area was fixed as displayed infarct area divided by actual infarct size, which was 84.58+-7.86% (mean+-SD) in apical, 130.25+-15.10% in basal and 109.99+-16.28% in even group respectively. There were significant changes among each group. To explain the infarct size more precisely, a new method of "Bullet" was employed. The shape of heart is similar to a bullet. A pointed end of bullet resembles the apex of heart, and an opposite side the base. The surface of bullet discloses 360 measuring points in six slices as normal or infarct. The bullet can be seen from any place such as anterior, septal, posterior and lateral. The rates of area at measuring points in each layer were 1, 1 and 0.96 in basal, middle and apical, respectively. The benefit of this "bullet" method is to understand easily about location and extension of infarct. Furthermore, the rate of infarct area is more accurate.
PracticeClinical medicine
KeywordsSPECT, Infarct area, Thallium-201, Cardiac functional display, Polar map.

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