| Japanese |
|---|
| Title | Rotating Bilateral Collimator法によるECG同期心筋断層シンチグラフィー - 臨床応用とアーティファクトに関する検討 - |
|---|
| Subtitle | 原著 |
|---|
| Authors | 駒谷昭夫*, 高橋和栄*, 高梨俊保*, 山口昂一* |
|---|
| Authors(kana) | |
|---|
| Organization | *山形大学医学部放射線科 |
|---|
| Journal | 核医学 |
|---|
| Volume | 22 |
|---|
| Number | 1 |
|---|
| Page | 43-48 |
|---|
| Year/Month | 1985/1 |
|---|
| Article | 原著 |
|---|
| Publisher | 日本核医学会 |
|---|
| Abstract | 「要旨」バイラテラルコリメータ回転によるタリウム (Tl-201) 心筋断層シンチグラフィーを心拍同期法にて行った. 約16分間のデータ収集により実用的な画像が得られ, 日常検査への導入が可能であった. 臨床使用において下壁〜心尖部にアーティファクトによる欠損像 (疑似欠損像) が頻発した. その原因を究めるため, ファントームによる実験, および呼吸同期法による画像再構成を行い, 呼吸による心臓の移動や左室容積の変化について検討した. その結果, 呼吸により左室中心の位置は約15mm移動し, 左室容積は約40%変化することがわかった. 疑似欠損の主因は, 呼吸に伴うこれらの動きと, 横隔膜による周期的なマスキングであると考えられた. したがって, 欠損像の真偽の判定には, 心拍に伴う心筋厚の変化や壁運動, および横隔膜との位置関係を併せ考慮することが肝要である. |
|---|
| Practice | 臨床医学：一般 |
|---|
| Keywords | Rotating bilateral collimator, ECG gated SPECT, Myocardial SPECT, Aartifact of SPECT, Respiratory induced cardiac motion |
|---|
| English |
|---|
| Title | ECG-gated Myocardial Tomo-scintigraphy by Rotating Bilateral Collimator - Clinical Apprication and Artificial Defect - |
|---|
| Subtitle | Original Articles |
|---|
| Authors | Akio KOMATANI, Kazuei TAKAHASHI, Toshiyasu TAKANASHI, Koichi YAMAGUCHI |
|---|
| Authors(kana) | |
|---|
| Organization | Department of Radiology, Yamagata University School of Medicine |
|---|
| Journal | The Japanese Journal of nuclear medicine |
|---|
| Volume | 22 |
|---|
| Number | 1 |
|---|
| Page | 43-48 |
|---|
| Year/Month | 1985/1 |
|---|
| Article | Original article |
|---|
| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
|---|
| Abstract | [Summary] Tomo-scintigraphy of 201Tl-myocardium by rotating bilateral collimator was performed in synchronization with cardiac cycle. Ten frames per R-R interval were acquired with ECG pulse signal during 16 min and tomographic reconstruction of end-diastolic and end-systolic image was done. This method was very useful to estimate not only three dimensional distribution of Tl-201, but also wall motion and change of wall thickness during cardiac cycle. However, through its clinical application, artificial defect was frequently noticed at inferior-apical portion of the myocardium. In order to eluciate the cause of the artifact, influence of tilted projection and cardiac motion due to respiratory was also investigated. During inspiratory phase of patients in rest, increment of volume up to 40% and 15 mm of caudal deviation of the left ventricle were observed. Furthermore, periodic motion of the diaphragm interrupted emission of gamma ray from the myocardium. It is proved that main cause of the artifact was not tilting projection, but these influence of respiratory motion. |
|---|
| Practice | Clinical medicine |
|---|
| Keywords | Rotating bilateral collimator, ECG gated SPECT, Myocardial SPECT, Aartifact of SPECT, Respiratory induced cardiac motion |
|---|