Real time dose distribution display by digital computer.
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Computers↗
Biomedical subjects
K Inamura
Publications and source records attributed to K Inamura.
Planning for PACS at Osaka University Hospital.
We have a plan to adopt PACS as a medical image information system in the new hospital. In order to construct PACS suitable for our hospital, a preliminary survey was carried out to determine how PACS should be introduced and what are the physicians requirements for a new medical image system. The most important requirement of the physicians was a good quality workstation. Our plan of a new medical image information system is as follows. A primary database will be constructed according to each of modalities in the Department of Radiology. In the Department of Medical Information Science, we will make a secondary database according to the patient. Although it may be difficult for us to obtain a sufficient budget digitalizing all medical images by our move to the new hospital, our goal is to establish total PACS throughout the new hospital in 1995.
Computer Communication Networks↗
HIS/RIS contribution to image diagnosis and maximization of efficacy of PACS when coupled with HIS/RIS.
To maximize the efficacy of the PACS coupled with the HIS/RIS and to clarify the effectiveness of the PACS itself, the amount of contribution of the HIS/NS to image diagnosis was measured beforehand. Video-tape recorders were used to record the CRT display of the HIS/RIS terminals and the simultaneous conversation between a patient and his physician in the clinics of our hospital. Consultation time and entry time for image examination order were measured for each case by replay of the tape. Consultation time was approximately 10 min, while order time was 2-3.5 min depending on whether the physician was an internist or an orthopedist. Detailed description on an order was closely related to detailed reports. The HIS/RIS contributed to image diagnosis even before the PACS was coupled. Concrete methods of efficacy maximization of the PACS were pointed out by internists and orthopedists in terms of modalities, outpatient clinics and wards.
Ambulatory Care Facilities↗
Development and evaluation of PC-based HIS-RIS-modality-PACS coupling: the results of evaluation of initial stage with personal computer application.
A PC-based HIS/RIS/Modality/PACS coupling was developed and operated where hospital-wide PACS was closely cooperated with the HIS and RIS. Three workstations with a magneto-optical disk (MOD) juke-box for each one were used as PACS servers to collect images from eight computed radiography systems and three CT scanners. An implementation of JPEG compression reduced network load and storage volume. Twenty PACS-terminals can be connected to the PACS servers and get images from them. Functions of the terminals are magnification, tone scale modification and mensuration. The physicians can also get images on HIS-terminals employing improved HIS-terminal functions. This system has many advantages: (1) inexpensive; (2) close cooperation with the HIS and RIS which makes them easy to manage and retrieve images automatically; and (3) it is an open system, which enables us to apply new technologies. As a matter of fact the introduction of a new PC and a new OS made it possible to decrease displaying response time.
Evaluation Studies as Topic↗
Teleradiology at Gunma University Hospital.
Using NEC MediFile 1000 and the public telephone system, the Department of Radiology of Gunma University Hospital and Saitama Medical School deliver image diagnosis to fellow clinicians and affiliated hospitals. The system consists of digitizing, filing, processing, retrieving and archiving units for radiographs and documents. Images were digitized by CCD and filed in 2 Gbyte double sided optical disk, which can accommodate 500 sheets of 14 x 17 films on 1500 of the smallest size slats without data compression. Image resolution was evaluated by ROC curve using multiple pulmonary nodules. The time taken for image transfer over 24 km was tested with various film sizes, image varieties and data compression rates.
Computer Communication Networks↗
Analysis of bone scintigram data using a speech recognition reporting system.
A total of 649 bone scintigram reports were stored using a voice pattern recognition system in a general-purpose medium-sized computer ACOS-650, and bone scintigraphy carried out in this institute was examined by analysing these data. The results showed that the introduction of the system made it possible to analyse all the data quickly, whereas previously the amount of information that could be analysed was restricted because of the complexity of the data. The results also showed that the system would be useful for understanding the examinations carried out in the whole hospital as well as for analysing metastatic tumours and the numbers of patients receiving examinations. Furthermore, it would be helpful in the logical analysis of reports prepared by doctors.
Adolescent↗
Analysis of bone scintigram data using speech recognition reporting system--data analysis with speech recognition system.
Five hundred eighty bone scintigram reports were stored using a voice pattern recognition system in a general-purpose, middle-sized computer (ACOS-650). Bone scintigraphy carried out in our institute was examined by analyzing these data. The results of the examination showed that the introduction of this system made it possible to analyze all the data quickly. Before the introduction of this system, the data able to be analyzed had been restricted because of their complexity. The results also showed that this system would be useful for understanding the examinations carried out in the whole hospital as well as for analyzing metastatic tumors and the number of patients receiving examinations. Furthermore, this system would be helpful in the logical analysis of reports prepared by doctors.
Bone and Bones↗
Consistency of variables in PCS and JASTRO great area database.
PURPOSE: To examine whether the Patterns of Care Study (PCS) reflects the data for the major areas in Japan, the consistency of variables in the PCS and in the major area database of the Japanese Society for Therapeutic Radiology and Oncology (JASTRO) were compared. METHODS AND PATIENTS: Patients with esophageal or uterine cervical cancer were sampled from the PCS and JASTRO databases. From the JASTRO database, 147 patients with esophageal cancer and 95 patients with uterine cervical cancer were selected according to the eligibility criteria for the PCS. From the PCS, 455 esophageal and 432 uterine cervical cancer patients were surveyed. Six items for esophageal cancer and five items for uterine cervical cancer were selected for a comparative analysis of PCS and JASTRO databases. RESULTS: Esophageal cancer: Age (p=.0777), combination of radiation and surgery (p=.2136), and energy of the external beam (p=.6400) were consistent for PCS and JASTRO. However, the dose of the external beam for the non-surgery group showed inconsistency (p=.0467). Uterine cervical cancer: Age (p=.6301) and clinical stage (p=.8555) were consistent for the two sets of data. However, the energy of the external beam (p<.0001), dose rate of brachytherapy (p<.0001), and brachytherapy utilization by clinical stage (p<.0001) showed inconsistencies. CONCLUSION: It appears possible that the JASTRO major area database could not account for all patients' backgrounds and factors and that both surveys might have an imbalance in the stratification of institutions including differences in equipment and staffing patterns.
Adult↗