Situations in which the use of the film + yellow holder dosemeter is of benefit are:

• Where x-rays produced with tube voltages between 20 kVp and 180 kVp are used (such as in working in medical x-ray diagnosis, chiropractic, veterinary, dental, mammographic and podiatric practices).
• Where technetium-99 and thallium-201 are used, such as in nuclear medicine (scintigraphy) departments.
• Where iodine-125 is used, such as in research laboratories.

Situations in which the use of the film + blue holder dosemeter is of benefit include all situations the film + yellow holder dosemeter is of benefit, and:

• Where x-ray machines, linear accelerators, and radioactive materials are used for treating disease.  This includes the following occupations: radiotherapists, radiation therapists, nuclear medicine radiographers involved in the use of iodine-131, medical physicists etc.
• Where industrial radiography is carried out in non-destructive testing.
• Where a wide range of sealed and unsealed radioactive materials are used as tracers in medical and other laboratories.

Situations in which the use of a ring dosemeter is of benefit are:

• Where unsealed sources containing gamma and high-energy beta emitting radioactive materials are handled.  Appropriate nuclides include iodine-131, iodine-125, molybdenum-99, technetium-99m, thallium-201 and phosphorous-32.
• Where hands are required to be close to sealed radioactive sources, such as in servicing or inspection operations (including wipe testing).
  In interventional and other diagnostic radiology practices where hands may be close to primary x-ray beams.