Dynamic lung tumor phantom coupled with chest motion

Misael Del Valle, Mohammed Goryawala, Anthony J. McGoron

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations


Motion artifacts have always been a non-desired effect in the field of Medical Imaging. Thus new technologies are being investigated to ameliorate the damaging effects of image blurring caused by motion. The development of these new technologies requires the use of phantoms as a means of precise, repeatable and controllable source of motion for testing initial algorithms and prototypes. The objective of this project was to design a dynamic lung tumor phantom coupled with chest motion. The phantom consists of a pair of linear actuators. The complete design, excluding the actuators was built in house out of acrylic materials with low attenuation factors, making it ideal for PET studies. The linear actuator is a stepper motor coupled to a lead screw which translates rotational motion into linear displacement at a rate of 0.0254 mm/step. The system is driven by a PIC microcontroller that allows the user to select different tumor motion parameters, and is capable of performing 3D motion. The phantom is capable of providing lung tumor and chest position with an accuracy of 1.3 um in the axis of motion, with a displacement of up to 52 mm and maximum velocity of 21.59 mm/second. The design has proven to be suitable for simulating lung tumor motion in PET studies, as well as testing motion tracking algorithms. However it can also be used in studies dealing with gated radiotherapy.

Original languageEnglish (US)
Title of host publicationMedical Imaging 2008 - Visualization, Image-Guided Procedures, and Modeling
StatePublished - 2008
Externally publishedYes
EventMedical Imaging 2008 - Visualization, Image-Guided Procedures, and Modeling - San Diego, CA, United States
Duration: Feb 17 2008Feb 19 2008

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


ConferenceMedical Imaging 2008 - Visualization, Image-Guided Procedures, and Modeling
Country/TerritoryUnited States
CitySan Diego, CA


  • Dynamic phantom
  • Gating
  • Image-guided radiotherapy (IGRT)
  • Lung tumor
  • Positron emission tomography (PET)
  • Real-time tracking algorithms

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Biomaterials
  • Radiology Nuclear Medicine and imaging


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