Which tolerance is expressed as a linear millimeter value for table movement?

Which tolerance is expressed as a linear millimeter value for table movement?

• A. Table travel maximum range tolerance (all directions) ±2 mm
• B. Table angle tolerance 1°
• C. Annual couch rotation isocenter tolerance ±1 mm
• D. Electron applicator interlocks tolerance functional

Answer: (A)

Tolerances for movement are expressed in linear millimeters when they describe how far something can physically shift. The table travel maximum range tolerance describes how far the treatment couch can move in any direction, and it’s given as a millimeter value (±2 mm). That makes it the direct, linear measure of table movement. The other items use angular or non-displacement concepts: table angle tolerance is in degrees, couch rotation isocenter tolerance is a linear measure but relates to the isocenter during rotation rather than the table’s straight‑line travel, and electron applicator interlocks tolerance is a functional, not a numeric displacement, tolerance.

Tolerances for movement are expressed in linear millimeters when they describe how far something can physically shift. The table travel maximum range tolerance describes how far the treatment couch can move in any direction, and it’s given as a millimeter value (±2 mm). That makes it the direct, linear measure of table movement.

The other items use angular or non-displacement concepts: table angle tolerance is in degrees, couch rotation isocenter tolerance is a linear measure but relates to the isocenter during rotation rather than the table’s straight‑line travel, and electron applicator interlocks tolerance is a functional, not a numeric displacement, tolerance.