phantom material | tissue equivalent material | tissue equivalent substance

tissue equivalent ionisation chamber | tissue equivalent ionization chamber

tissue equivalent ionization chamber | tissue-equivalent ionization chamber

tissue equivalent ionization chamber

tissue equivalent proportional counter [ TEPC | TEPC radiation counter ]

rep [ rep unit | roentgen equivalent physical | parker | tissue roentgen ]

Definition: This block contains a wide variety of disorders that differ in severity and clinical form but that are all attributable to the use of one or more psychoactive substances, which may or may not have been medically prescribed. The third character of the code identifies the substance involved, and the fourth character specifies the clinical state. The codes should be used, as required, for each substance specified, but it should be noted that not all fourth character codes are applicable to all substances. Identification of the psychoactive substance should be based on as many sources of information as possible. These include self-report data, analysis of blood and other body fluids, characteristic physical and psychological symptom ...[+++]s, clinical signs and behaviour, and other evidence such as a drug being in the patient's possession or reports from informed third parties. Many drug users take more than one type of psychoactive substance. The main diagnosis should be classified, whenever possible, according to the substance or class of substances that has caused or contributed most to the presenting clinical syndrome. Other diagnoses should be coded when other psychoactive substances have been taken in intoxicating amounts (common fourth character .0) or to the extent of causing harm (common fourth character .1), dependence (common fourth character .2) or other disorders (common fourth character .3-.9). Only in cases in which patterns of psychoactive substance-taking are chaotic and indiscriminate, or in which the contributions of different psychoactive substances are inextricably mixed, should the diagnosis of disorders resulting from multiple drug use (F19.-) be used. | Modifiers The following fourth-character subdivisions are for use with categories F10-F19: Code Title .0 Acute intoxication A condition that follows the administration of a psychoactive substance resulting in disturbances in level of consciousness, cognition, perception, affect or behaviour, o ...

(2) If the automatic exposure control of diagnostic X-ray equipment is selected, the variation in optical density set out in subsection (3) or (4) must be determined using objects that are made of human-tissue equivalent material and have thicknesses that are representative of the actual range of the body thicknesses of the patients.

Whereas certain ruminant tissues should be designated as specified risk materials on the basis of the pathogenesis of TSEs and the epidemiological status of the country or region of origin or residence of the animal concerned, whereas the specified risk materials should be removed and disposed of in a manner which avoids any risk to human or animal health; whereas, in particular, they should not placed on the market for human food, animal feed or fertiliser; whereas, however, provision should be made for an ...[+++]equivalent level of health protection to be achieved by means of a test for TSEs carried out on individual animals; whereas slaughter techniques presenting a risk of causing brain material to contaminate other tissues should not be permitted in countries or regions other than those presenting the lowest risk of BSE;

Whereas certain ruminant tissues should be designated as specified risk materials on the basis of the pathogenesis of TSEs and the epidemiological status of the country or region of origin or residence of the animal concerned, whereas the specified risk materials should be removed and disposed of in a manner which avoids any risk to human or animal health; whereas, in particular, they should not placed on the market for human food, animal feed or fertiliser; whereas, however, provision should be made for an ...[+++]equivalent level of health protection to be achieved by means of a test for TSEs carried out on individual animals, once such test have been fully validated ; whereas slaughter techniques presenting a risk of causing brain material to contaminate other tissues should not be permitted in countries or regions other than those presenting no BSE;