| Japanese |
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| Title | カラー・テレビによるシンチグラムの色彩別表示方法 |
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| Subtitle | 原著 |
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| Authors | 筧弘毅, 有水昇, 内山暁, 大川治夫** |
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| Organization | *千葉大学放射線医学教室 |
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| Journal | 核医学 |
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| Volume | 2 |
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| Number | 3/4 |
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| Page | 157-165 |
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| Year/Month | 1965/12 |
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| Article | 原著 |
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| Publisher | 日本核医学会 |
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| Abstract | 「まえがき」面スキャニングとは人体内諸臓器に局在したRIを体外より計測し, RIの拡り, 大きさ, 位置等を描写することである. スキャニングにより人体内諸臓器の形状位置のみならず機能状態および病変をも体外から描写することができる. 初期にはスキャニングは専ら甲状腺の描写と診断に応用されるに過ぎなかったが, 計測技術, 装置の改良進歩, 描写技術の改善等, あるいは使用されるRIの研究開発により, 現今では甲状腺のみならず, 脳, 肺, 肝, 脾, 膵, 腎, 骨, 骨髄等の人体内におけるほとんどすべての主要臓器の描写と診断に用いられている. このため, スキャニングの臨床的価値は益々向上し, スキャニングはRIによる疾患の臨床検査法および診断法の中でもっとも重要なものの1つとなるに至った. スキャニングの欠点の1つはその描写像(シンチグラムと称する)X線写真のように鮮明にえられないことである. |
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| Practice | 臨床医学：一般 |
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| English |
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| Title | Scan Reading by a Closed Circuit Color Television System |
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| Subtitle | |
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| Authors | Hirotake Kakehi, Noboru Arumizu, Guio Uchiyama, Haruo Ohkawa |
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| Organization | |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 2 |
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| Number | 3/4 |
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| Page | 157-165 |
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| Year/Month | 1965/12 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] As a new method of analyzing radioisotope scan records, a closed circuit color television system has been devised. In a scan record the density variation of dots gives the basic element for diagnostic property. But in many cases density variations are so scarce that the important informations are hidden from the naked eye. For a routine examination of the scan record, we have been using a closed circuit television system so far. This is one of the simplest method of the contrast accentuation and is very excellent in the interpretation of scan-records. In this method the scan record is viewed by a television camera, and is reproduced on an image tube as the images with various contrast in black and white. The cutoff in various levels and contrast accentuation in various degrees of amplification can be easily achieved. The scan recording in color was devised by Mallard and Kakehi. In this method, the variations in counting rate are represented as those in colors. Contrast is more easily perceptible in colored patterns than in black and white. In order to obtain higher contrast amplification we devised the combined system of the closed circuit television and scan recording in color. The density variation in black and white of a scan record is reproduced as a contrast-amplified colored image on a television image tube. In principle, the original scan in black and white placed on a uniformly illuminated light box is viewed by the television vidicon camera. The image signals are sent to the color modulator and are divided into four color signals - black, blue, green and red - in the order of density. And then the colored image of original scan is reprodued on a television image tube. The components of the apparatus are as follows; 1. Viewer This is for lighting the original record. The light intensity of whole area of the viewer must de fairly uniform. A view box with fluorescent tubes for the X-ray film is used. 2. Television camera The transisterized industrial television monitor - "Home Vision", HV - M - 23 CA made by Shiba Denki - with a vidicon camara is used. The ordinary lens of F 1.4 is good enough to give satisfactory light value. 3. Color Modulator A pulse height analyzer generates one of the four color signals according to the pulse height. The pulse height and color selection levels are arbitrarily adjusted, and so a certain density range in the original scan is converted to any color. 4. Color image tube A 14-inches home color television tube is used. By adjusting the gain of the color modulator and the iris size of the vidicon camera, a certain range of density in the original scan can be arbitrarily converted to a certain color. This system is routinely used for the interpretation of original scans of various organs to improve the diagnostic property of the radioisotope area scanning. It is very useful for the case of pancreas scanning with 75Se-Methionine. As the pancreas is situated deep in the body, surrounded by many organs such as liver or intestines, some kind of the contrast accentation is needed for the interpretation of a scan record. It is particularly necessary to differentaite the pancreas image from the liver, that also takes up 75Se-Methionine. One example of preoperatively determined pancreatic carcinoma is shown by the color television system. In case of the brain scan, the outline of the face and head drawn on the original record is reproduced on the television image and is useful to give the orientation of the site. A sarcoma in the right iliac bone is shown by the bone marrow scan of pelvis with 198Au colloid. The sarcoma-invaded bone marrow is shown by the scarce uptake of the colloid. The original record does not give a clear image of pelvis because of the restriction of dosage and low uptake, and the color television system would be useful in such a case. |
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| Practice | Clinical medicine |
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