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Biomedical subjects

R Van Loon

Publications and source records attributed to R Van Loon.

6 recordsLinked to original sources

Quality assurance in conformal radiotherapy: DYNARAD consensus report on practice guidelines.

BACKGROUND AND PURPOSE: Conformal radiotherapy has only recently been widely implemented. Although not all aspects have yet been adequately proven, it is generally recognized that maintaining a high degree of precision throughout the process is critical to the treatment outcome while the focus for quality assurance and quality improvement will need to concentrate more on human factors, procedures, communication, organization and training. A general consensus document on quality assurance guidelines for institutions that deliver conformal radiotherapy treatments to patients has been elaborated within the framework of the DYNARAD/BIOMED concerted action on conformal radiotherapy. The present paper aims to highlight those issues that were identified as of specific importance to conformal radiotherapy. The work reported here further details this guidance by direct correlation with the issues involved in the special case of conformal radiotherapy. METHODS: The DYNARAD document has been drafted in the form of a desktop guide comprising six sets of guidelines and is based on the ESTRO advisory report on 'Quality Assurance in Radiotherapy'. RESULTS AND CONCLUSIONS: The document has been endorsed by the DYNARAD group of institutions. As such it can form the basis for further discussions and enter into the subsequent phase of expanding its consensus basis.

Consensus Statements as Topic

The role and contribution of a medical physicist in a radiology department.

This report aims to present the rationale for the integration of a medical physicist in large radiology departments, based on legal regulations and underlying scientific arguments. Examples of contributions of medical physicists are given in the field of radiation monitoring of the patient, occupational exposure of staff, quality assurance programs and technical quality control, together with the role of the physicist in education and in medical research and his contribution to the economics of the department.

Cost Control

Quality control in mammography: practical implications.

The programme "Europe against cancer" stimulated, among other activities, breast screening activities in the member states. From the beginning, it was clear that a rigorous and efficient approach required the highest possible quality of the three major components of a breast screening programme: the medical performance (correct positioning, training of the medical staff, double reading of the mammograms and feedback from the pathologist and the epidemiologist), the organisation (attendance rate, data base) and the quality of the imaging process (compliance of the image quality and the breast dose with the CEC document of 1990). The first part of this paper will be limited to the latter component and the second part to the subject of correct positioning of the breast.

Female

Technical quality control in mammography screening: first results in Belgium.

In this paper the first results of the application in Belgium of the European protocol for the technical quality control of mammography screening are presented. Twelve mammography screening units were submitted to an acceptance test: one fourth complied with the criteria after a second visit. A daily quality control procedure has been run since eighteen months. The most important detected problems are given and discussed. The European Commission, in the framework of "Europe Against Cancer", recently published the "European Guidelines for Quality Assurance in Mammography Screening" (1). In another contribution (2), a brief overview of the important appendix "European Protocol for the Quality Control of the Technical Aspects of Mammography Screening" was given. In this paper the first results for the application of this protocol in Belgium are presented.

Female

The influence of the ambient temperature on tumour growth, metastasis and survival in mice.

The effect of ambient temperature was analysed on the behaviour of MO4 cells which are malignant, invasive and metastasizing C3H mouse fibroblastic cells when implanted in the tail of the syngeneic animal. Raising the ambient temperature to 28 degrees C increases growth of the primary tumour, incidence of metastases and shortens survival. Lowering the ambient temperature to 13 degrees C prevents all these phenomena. Measurements at the implantation site show that the temperature of the tail remains in a range +/- 2-3 degrees C in accordance with the environment. From these results we conclude that room temperature may be important when experiments are performed in vivo.

Animals