Mobile Nuclear Medicine Service
According to 10CFR35.80, a licensee providing mobile nuclear medicine
service to a client must
(a) Have a letter signed by the licensee and the management of each client
spelling out the details of the responsibility and authority of the client
and the licensee,
(b) Calibrate and check the instruments for measuring dosages and
surveying,
(c) Measure dosages and perform surveys of the area of uses at the client
address, and
(d) The client must have a license for receiving and using by-product
material.
Written Directives
According to 10CFR35.40, a written directive is required when a dosage
greater than 30mCi (1.11 MBq) of^131 I-NaI or a therapeutic dosage of an
unsealed by-product material other than^131 I-NaI is administered to a
patient or human research subject. The written directive must be dated and
signed by an authorized user and must contain the patient’s name, the
dosage, the name of the drug, and route of administration. A revision of the
written directive can be made, if necessary, provided it is signed and dated
by the authorized user before administration. In case of an emergency, an
oral revision to an existing written directive is acceptable, which must be
followed by a written directive within 48 hours.
According to 10CFR35.41, the licensee shall develop and maintain a copy
of the written procedures for the written directive that include specific ver-
ifications of the identity of the patient before each administration, and that
the administration is in accordance with the written directive. The identity
of the patient may be verified by the name, driver’s license, birthday, any
hospital’s I.D. number, and so on.
Measurement of Dosages
According to 10CFR35.63, all dosages for patient administration must be
measured in an instrument (dose calibrator) that is calibrated with nation-
ally recognized standards or the manufacturer’s instructions (10CFR35.60).
Although the methods of calibration are not specifically prescribed in
10CFR35, the constancy, accuracy, linearity, and geometry of the dose cali-
brator must be checked as described in Chapter 7.
For unit dosages, the activity can be determined by direct measurement
or by the decay correction of the activity provided by the licensed manu-
facturer. For dosages other than unit dosages, the activity must be deter-
Medical Uses of Radioactive Materials 285