Arizona Administrative Code › Title 9 - HEALTH SERVICES › Chapter 7 - DEPARTMENT OF HEALTH SERVICES - RADIATION CONTROL › Article 9 - PARTICLE ACCELERATORS › Section R9-7-902 - Definitions

Current through Register Vol. 30, No. 28, July 12, 2024
The following definitions apply in this Article, unless the
				  context otherwise requires:
"Added filter" (See R9-7-602).
"Arc therapy" means radiation therapy that uses electrons to
				  treat large, superficial volumes that follow curved surfaces, as in
				  postmastectomy patients.
"Authorized medical physicist" means an individual who meets
				  the requirements in R9-7-711. For purposes of ensuring that personnel are
				  adequately trained, an authorized medical physicist is a "qualified expert" as
				  defined in Article 1.
"Beam-limiting device" (See R9-7-602)
"Beam-monitoring system" means a set of devices that will
				  monitor the useful beam, as defined in R9-7-602, during irradiation and
				  terminate irradiation when a preselected number of monitor units has been
				  accumulated.
"Collimator" (See R9-7-602)
"Control panel" (See R9-7-602)
"Full beam detector" means a radiation detector of such size
				  that the total cross section of the maximum size useful beam is
				  intercepted.
"Gantry" means that part of a linear accelerator that
				  supports the radiation source so that it can rotate about a horizontal
				  axis.
"General supervision" means that a radiation therapy
				  technologist is furnished with a procedure for performing therapy under an
				  authorized user's overall direction and control, and the authorized user is
				  responsible for ensuring that the procedure is followed, but the authorized
				  user's presence is not required in a medical institution during the performance
				  of the procedure.
"Intensity-Modulated Radiation Therapy (IMRT)" means an
				  advanced mode of high-precision radiotherapy that uses computer-controlled
				  linear accelerators to deliver precise radiation doses to a tumor or specific
				  areas within the tumor.
"Isocenter" means the point of intersection of the collimator
				  axis and the axis of rotation of the gantry.
"Monitor unit" means a unit response from the beam monitoring
				  system from which the absorbed dose can be calculated.
"Moving beam therapy" means radiation therapy in which there
				  is displacement of the useful beam relative to the patient. Moving beam therapy
				  includes arc therapy, skip therapy, and rotational beam therapy.
"Radiation therapy technologist" means an individual
				  certified according to 9 A.A.C. 16, Article 6, whose scope of practice is
				  specified according to A.A.C. R9-16-608(D).
"Rotational beam therapy" means radiation therapy that is
				  administered to a patient from a radiation source that rotates around the
				  patient's body or the patient is rotated while the beam is held fixed.
"Skip therapy" means rotational beam therapy that is
				  administered in a way that maximizes the dose to an area of interest and
				  minimizes the dose to surrounding healthy tissue.
"Special procedure" means a type of therapy through which
				  radiation is delivered to a patient through five or fewer fractions or with a
				  dose per fraction greater than 6 Gy.
"Spot check" (See R9-7-602)
"Stationary beam therapy" means radiation therapy that
				  involves a beam from a radiation source that is aimed at the patient from
				  different directions. The distance of the source from the isocenter remains
				  constant irrespective of the beam direction.
"Virtual source" means a point from which radiation appears
				  to originate.