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Biomedical subjects

K Inamoto

Publications and source records attributed to K Inamoto.

At least 19 recordsLinked to original sources
PubMed1994

Development and evaluation of oral reporting system for PACS.

Experimental workstations for oral reporting and synchronized image filing have been developed and evaluated by radiologists and referring physicians. The file media is a 5.25-inch rewritable magneto-optical disk of 600-Mb capacity whose file format is in accordance with the IS&C specification. The results of evaluation tell that this system is superior to other existing methods of the same kind such as transcribing, dictating, handwriting, typewriting and key selections. The most significant advantage of the system is that images and their interpretation are never separated. The first practical application to the teaching file and the teaching conference is contemplated in the Osaka University Hospital. This system is a complete digital system in terms of images, voices and demographic data, so that on-line transmission, off-line communication or filing to any database will be easily realized in a PACS environment. We are developing an integrated system of a speech recognizer connected to this digitized oral system.

Education, Medical↗
PubMed1993

[Development of oral reporting system in PACS environment].

An experimental radiologic reporting system using oral presentations has been developed and tested. The rewritable and compact magneto-optical disk (MOD) is employed to store oral diagnostic reports together with read radiologic images. The MOD is 5.25 inches in diameter, has a 600 MB memory capacity, and is erasable, light and compact. Advantages of the system are simultaneous retrieval of oral reports by a radiologist and the images he or she interpreted, and the capability of media circulation in addition to the function of filing. Thus MOD has a multimedia function of both off-line communication and filing. When medical images are interpreted and oral presentations are registered, automatically digitized oral reports and digitized images are filed in the MOD. Referring physicians can get oral diagnostic reports and can see the images at the same time on a personal computer. Furthermore, integration with voice recognition capability is being tried in our experiment.

Communication↗
PubMed1992

[Image processing of early gastric cancer cases].

Computer image processing was used to enhance gastric lesions in order to improve the detection of stomach cancer. Digitization was performed in 25 cases of early gastric cancer that had been confirmed surgically and pathologically. The image processing consisted of grey scale transformation, edge enhancement (Sobel operator), and high-pass filtering (unsharp masking). Gery scale transformation improved image quality for the detection of gastric lesions. The Sobel operator enhanced linear and curved margins, and consequently, suppressed the rest. High-pass filtering with unsharp masking was superior to visualization of the texture pattern on the mucosa. Eight of 10 small lesions (less than 2.0 cm) were successfully demonstrated. However, the detection of two lesions in the antrum, was difficult even with the aid of image enhancement. In the other 15 lesions (more than 2.0 cm), the tumor surface pattern and margin between the tumor and non-pathological mucosa were clearly visualized. Image processing was considered to contribute to the detection of small early gastric cancer lesions by enhancing the pathological lesions.

Adult↗
PubMed1992

Oral diagnostic reporting and synchronized image filing using magneto-optical disks.

An experimental radiologic reporting system has been developed and tested. The rewritable and compact magneto-optical disk (MOD) is applied to storing medical images with oral diagnostic reports of these radiologic images. The disk is 5.25 inches in diameter, has 600 MB memory capacity, is erasable, light and compact. Advantages are simultaneous recording of radiologic images and their oral reports by radiologists, and application to circulation of media inside the hospital as well as to filing of medical images. The MOD has a multimedia function of communication and filing. When medical images are taken and stored, oral interpretation by radiologists can be simultaneously added. Physicians can get information of the images and their reports by oral speech at the same time in front of computer workstation. Furthermore, integration of a voice recognition capability is now being undertaken.

Image Processing, Computer-Assisted↗
PubMed1991

[Magneto-optical disk filing system for oral diagnostic reports and their synchronized images].

The rewritable and compact media of magneto-optical disk (MOD) is firstly applied to store medical images with spoken reporting. The MOD has multi-media function of communication and filing. Our system is optimized in terms of recording length of speech based upon our clinical research. The results will have influences over the future PACS. One of their examples is possibility of multimedia PACS with images, speeches and demographic data. Another example is prevention of dispersion of images which have no interpretations by radiologists. Our next step is to recognize filed speech in background processing for printing reports.

Optical Storage Devices↗
PubMed1986

Effect of essential trace metals on bone metabolism in weanling rats: comparison with zinc and other metals' actions.

The effect of essential trace metals on bone metabolism was investigated in the femoral diaphysis of weanling rats. Oral administration of zinc (1.53-306 mumol/100 g body weight) for 3 days produced significant increases in alkaline phosphatase activity and DNA content. These biochemical indices were also increased by oral administration of chromium (III), cobalt, copper, manganese, and nickel with the dose of 1.53 mumol/100 g. With the dose of 15.3 mumol/100 g of above all metals, except zinc, the enzyme activity was significantly decreased in comparison with control, while DNA content was not decreased significantly. Moreover, the effect of zinc on alkaline phosphatase activity and DNA content was not enhanced by simultaneous administration of other metals (1.53 mumol/100 g). The present study indicates that, of the essential trace metals, zinc can effectively stimulate the bone growth and calcification with comparatively higher dose levels. This suggests a nutritional significance of zinc on bone growth.

Alkaline Phosphatase↗
PubMed1986

Differential effects of calcium-regulating hormones on bone metabolism in weanling rats orally administered zinc sulfate.

The effect of calcium-regulating hormones on bone metabolism was investigated in weanling rats orally administered zinc sulfate. Administration of 1,25-dihydroxyvitamin D3 (1,25(OH)2D3 (150 ng/100 g BW) or parathyroid hormone (1-34) (PTH) (10 U/100 g) produced significant increases in alkaline phosphatase activity and DNA content in the femoral diaphysis, while calcitonin (CT) (1.0 U/100 g) did not have a significant effect. Administration of zinc (1.0 mg/100 g) caused a significant elevation of alkaline phosphatase activity and DNA content in the femoral diaphysis. In combination with these hormones and zinc, both 1,25(OH)2D3 and zinc caused a synergistic increase in diaphyseal alkaline phosphatase activity and DNA content, while the combination with zinc and PTH, or zinc and CT did not cause a synergistic increase. The synergistic effects in combination with 1,25(OH)2D3 and zinc were completely inhibited by treatment of mitomycin C (10 micrograms/100 g). Meanwhile, the increase in diaphyseal zinc content following zinc administration was not altered by treatment with 1,25(OH)2D3. These results indicate that zinc synergistically enhances 1,25(OH)2D3-stimulated bone metabolism. This suggests a physiologic significance of zinc in the regulation of bone metabolism.

Administration, Oral↗
PubMed1983

Computed tomography in the detection of small hepatocellular carcinomas.

Thirty-two patients with hepatocellular carcinoma less than 5 cm in diameter were examined by computed tomography. At the examination 26 patients (81%) were correctly diagnosed. A common type of CT image series was detectable as low density on the precontrast scan, a positive or mixed pattern on dynamic scan, and visible on postcontrast scan. In 10 patients with minute tumors (less than 2 cm), 7 were correctly diagnosed. CT was valuable for diagnosis of the small hepatocellular carcinomas larger than 1 cm by using the dynamic study after an intravenous bolus injection of the contrast medium.

Adult↗
PubMed1983

Arterioportal fistula in hepatocellular carcinoma.

A hepatic arterioportal fistula was visualized in a patient with hepatocellular carcinoma by sequential computed tomography (CT) after rapid bolus injection of contrast medium. Early contrast staining was demonstrated in the trunk and branches of the portal vein. The CT findings corresponded with those of celiac angiography.

Angiography↗
PubMed1982

Computed tomography of carcinoma of the ampulla of Vater.

CT findings were studied in 14 cases with carcinoma of the ampulla of Vater which were all proved by surgery. At pre-operation period, only 4 cases (29%) were accurately diagnosed and other 10 cases (71%) were misinterpreted on CT. The most concomitant error was a confusion with the pancreatic head carcinoma (57%). Although a mass was retrospectively visualized in 4 cases, indirect signs were rather prominent, such as enlargement of the pancreatic head (57%), dilatation of the pancreatic duct (71%) and that of the common bile duct (79%).

Aged↗
PubMed1981

CT of hepatoma: effects of portal vein obstruction.

CT images were studied in five patients with hepatocellular carcinoma associated with obstruction of branches of the portal vein. Two were solitary tumors located near the porta hepatis and were seen as low density areas. In addition noncancerous areas with impaired portal drainage also had lower densities than normally perfused areas. In one instance, gross and histologic studies performed on the resected specimen showed atrophy of hepatic tissue. The other three patients had disseminated tumors with multiple low density areas on CT. Additional low density areas were seen in patients with concomitant obstruction of branches of the portal vein. A decrease in portal blood flow will change the appearance of hepatocellular carcinoma of CT.

Adult↗