Biomedical subjects
Publications and source records attributed to G Ram.
A method for automatically outlining the left ventricle is described. The boundary at any point in the heart cycle is obtained from a convoluted image derived from an ordinary frame of count rate convoluted with a functional image frame scaled in the time of maximum count rate. The position of the pulmonary artery indicates the level of the aortic valve plane.
In this work a general purpose image processor is described, which takes into account the special features and the various requirements for analysing images in nuclear medicine. A new approach for system structure involving encoding and representing medical images is given. This encoder, which is part of the image processor, is efficient especially for long-term storage and for certain pattern recognition in medical imaging. In this processor a statistical package is incorporated for collecting medical statistics using the acquired patient data. This information is used together with the encoder for an automated diagnostic system.
This paper focuses attention on the fact that images considered unsatisfactory for medical analysis may be rendered usable following various image enhancement techniques. In those cases where this form of image processing can sufficiently improve otherwise unusable images, the necessity of repetitive administration of radionuclides to patients may be avoided with a concomitant reduction in ionizing radiation dosages. Application of these techniques in a clinical situation reduced the dose in thallium studies by 50%. Similar results may be obtainable with other nuclear medicine procedures.