Japanese
Title高時間分解能法による経時的心プールおよび心筋イメージング
Subtitle原著
Authors外山比南子*, 飯尾正宏*, 村田啓*, 川口新一郎*, 千葉一夫*, 松井謙吾*, 山田英夫*
Authors(kana)
Organization*東京都養育院付属病院核医学放射線部
Journal核医学
Volume14
Number1
Page41-49
Year/Month1977/2
Article原著
Publisher日本核医学会
Abstract「I. 緒言」RI利用による心機能検査は, 従来のカテーテル法に比べて, 被検者に与える負担が少なく, 重症者や老齢者の検査には, 特に適した検査法である. とくに, 99mTc-ヒト血清アルブミン(HSA)をbolusとして静注し, 心循環時間, 心室形態, shuntの有無などを検査するRIangiocardiographyに加えて, 数年前から, 心電計(ECG)と同期して検査する, いわゆる, ECG gated RI cardiographyが行われるようになり, RI心機能検査は, さらに精細なデータを与えるようになった. 在来施行されているECG gatedRIcardiographyの多くは, あらかじめ心電図をみながら, gateを開くべきR波からの遅延時間を設定して, 拡張終期, 収縮終期におけるイメージを採取する方法であった. この方法では, 期外収縮等が除外できない上に, 症例によって異る拡張終期や収縮終期の正確な決定も困難である.
Practice臨床医学：一般
Keywords
English
TitleA Method of High Temporal Resolution Sequential Cardiac Imaging of Blood Pool and Myocardium
SubtitleOriginal Articles
AuthorsHinako TOYAMA, Masahiro IIO, Hajime MURATA, Shinichiro KAWAGUCHI, Kazuo CHIBA, Kengo MATSUI, Hideo YAMADA
Authors(kana)
OrganizationDept. of Nuclear Medicine & Radiological Sciences Tokyo Metropolitan Geriatric Hospital
JournalThe Japanese Journal of nuclear medicine
Volume14
Number1
Page41-49
Year/Month1977/2
ArticleOriginal article
PublisherTHE JAPANESE SOCIETY OF NUCLEAR MEDICINE
AbstractMeasurment of sequential cardiac images was made by ECG gated method. Approximately 30 to 50frames of image per cardiac cycle were acquisited at 20 msec interval using γ-camera computer system. After a bolus of 99m-Tc albumin, injected intravenously, was equilibrated in the patient's blood pool, three ECG leads are attached. Selecting a sampling time(between 10 to 50 msec), frame number per cardiac cycle and beat number(1500 to 2000)to be collected, digitized x-y scintillation coordinates and R-markers from the ECG trigger device are accumulated in LIST mode and recorded on magnetic tape. These data are sorted into a sequence of images. The x-y data fromγ-camera that occured during the first 20 msec following the first R-marker(beat 1)are sorted into the first frame; the second 20 msec of x-y data are sorted into the second frame, and so on until given number of frames are reached. Following next R-marker(beat 2)the first 20 msec of x-y coordinates are sorted additively into frame 1, the second 20 msec of x-y coordinates into frame 2, and so on until all cardiac cycles have been sorted. Similar to the cardiac pool images, myocardial images were also examined at 20 minutes after injection of 3 mci 201-Tl. The cardiac pool and myocardial images give; 1)A contraction pattern of left ventricle generated at 80msec interval. Even and generalized contraction was noted in the normal control, however, in the case of myocardial infarction, the contour map revealed distorted motion. 2)Relative volume curve and ejection fraction of left ventricle. After subtraction background, relative volume curve was generated from change in count in left ventricle. 3)Change in myocardial thickness associated with cardiac movement obtained from myocardial images. As high temporal resolution and good statistic images are obtained by present method, various time dependent functional parameters of heart movement would be studied.
PracticeClinical medicine
Keywords

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