Department Of Veterans Affairs
VA Handbook 7610 (277)
Washington, DC 20420
June, 2006
2. Basic Room Efficiency Factor is 80%.
a. Modalities with routine, scheduled procedures and backup equipment (more)
than one piece of the same type of equipment in the department) should plan
for an efficiency factor of 85%.
Example: Assume a modality room that averages 30 minute per procedure/
suite stop:
250 operating days per year x 8 hours of operation per day
= 4,000 annual
30 minutes per procedure / 60 minutes
procedures
A maximum capacity of 4,000 procedure/suite stops per year, assuming 100%
utilization. However, 100% utilization is not realistic to achieve, thus, it is not
an accurate design standard. Apply Room Efficiency Factor:
4,000 x 80% = 3,200 annual procedures.
TABLE 1: WORKLOAD PARAMETERS CALCULATION
MINIMUM
WORKLOAD
AVERAGE
ANNUAL
TO
LENGTH OF
PROCEDURES
PROCEDURE
PER ROOM
GENERATE
ONE ROOM
PROCEDURE
(minutes)
(rounded)
Linear Accelerator
15
6,400
1,920
(IMRT) Room
CT Simulator Unit
60
1,600
480
Room
Ultrasound Planning
50
1,900
570
Unit Room
The number of annual procedures per room will be used as a criteria
parameter to calculate the number of procedure rooms in the Space Criteria
section of this document. The minimum workload to generate one room is
30% of the calculated annual procedures per room.
4. PROGRAM DATA REQUIRED (INPUT DATA QUESTIONS)
A.
Mission Input Data Statements
1.
Is 3D equipment authorized? (M)
2.
Is a Treatment Planning Computer Room Dosimetry authorized? (M)
3.
Is PACS authorized? (M)
4.
Is Teaching Viewing / Consultation authorized? (M)
5.
Is Tele-Radiology authorized? (M)
6.
Is a Radiation Therapy Residency Program authorized? (M)
7.
Is a Quality Assurance Office authorized? (M)
8.
Will Radiation Therapy procedures be film based? (M)
9.
Will the Linear Accelerator include a Maze Room? (M)
Radiation Therapy Service (Chapter 277): Page 5 of 17
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