Respiratory Motion Phantom Inserts

Multiple Testing Applications

Modus has developed a wide range of Optional Inserts for the QUASAR™ Respiratory Motion Phantom providing flexibility for multiple applications.

The Respiratory Motion Phantom is delivered with an 8 cm cedar insert for respiratory motion dosimetry in lung density material. The insert has a 2 cm opening to accommodate an acrylic ion chamber holder.

With additional inserts the phantom is capable of a wide variety of applications, such as planning system QA, dose distribution measurement for both neutral density and lung density material, 4D CT imaging, and 4D PET imaging.

  • Ion Chamber Measurements in Neutral Density Material
  • 2D Dose Distribution Measurement in Neutral Density
  • 4D CT Acquisition, Reconstruction, Display
  • 4D PET CT Acquisition, Reconstruction, Display, Registration

From left to right: Acrylic Insert, Film Cassette (for any film), 4D CT Imaging Insert, 4D PET CT Imaging Insert

Fill with liquid or gel for user-specific tasks.

modus hollowinsert
Hollow Insert with Screw Cap

2D Dose Distribution in and around a Tumour within Lung Density Material

Imaging and Chamber Dosimetry in a Tumour within Lung Density Material


Left: Cedar Lung Tumour Insert
(for Gafchromic film)

Right: Cedar Insert with Solid Tumour
(without drilling - for imaging only)

Offset Inserts
Oncology Systems Limited offers Modus' special series of three cedar inserts for use with the Respiratory Motion Rotation Stage. Each has an off-centre tumour, allowing testing with more complex motion during translation. These inserts feature the same characteristics as the above-pictured cedar respiratory motion inserts but with a modified tumour location.


All of the Respiratory Motion Inserts can be modified to enable stationary testing in the Multi-Purpose Body Phantom by using the MP Insert Adapter.

Custom inserts are available upon request for a wide variety of FARMER ion chambers, MOSFETs, diodes, and other point dose measurement devices.

Also in this section

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