Florida Tech 2009 Report
Real-time Lung Radiotherapy using Dynamic Lung Models
M.D. Anderson Cancer Center, Dr. Jannick Rolland, P.I.
Imagine a future when doctors use truly x-ray vision to see
inside a patient's body.
While they haven't perfected Superman-like vision yet,
researchers taking part in a Matching Grants Research Project from the Florida High Tech Corridor
Council are working on a new technology that will help doctors
visualize the movements of an internal organ - the lungs - in
real time. Doctors at the M.D. Anderson Cancer Center have
partnered with simulation experts at the University of Central
Florida (UCF) to develop a program that will show the physicians
a model of a patient's lungs so they can better administer
radiation treatment to tumors.
Created by UCF researchers Dr. Jannick
Rolland and Dr. Anand Santhanam, the technology utilizes a
head-mounted display that projects a 3-D lung model on goggles
designed to give the appearance that a physician is seeing
through a patient's chest. That model is a moving, breathing
lung, specific to that patient, expanding and contracting with
each breath as that patient's physiology would direct it.
The concept arose when the Army's
Simulation, Training & Instrumentation Command (STRICOM) was
looking for a way to train physicians and military medics to
assess internal trauma not easily recognizable on external
inspection. Rolland's then-graduate student, Santhanam,
utilized his experience in real-time rendering to develop a
model that solved this problem: a simulation that creates a
sense of real-time vision into the human body.
Doctors at Orlando's M. D. Anderson Cancer Center quickly
recognized an application for this technology in solving a
problem of their own: targeting moving tumors in patients with
lung cancer.
The joint grant from M. D. Anderson and the
Florida High Tech Corridor Council totaled more than $150,000,
which includes funding for the researchers and the four UCF
graduate students involved in the project.
"With our FHTCC grant, we are able to
continue validating our model of human physiology and motion
while working with M. D. Anderson to better optimize cancer
treatment," said Rolland.
Santhanam likened the radiation procedure
to trying to shoot a moving bird with a stationary gun.
"If our partner physicians at M. D. Anderson can predict where
the tumor is, our model can simulate how it moves with the lung
tissue as a patient breathes."
The simulation takes on additional
challenges in certain situations when a patient's normal
breathing pattern changes. If the patient is nervous or
panicky, the model can adapt to their physiology during a faster
rhythm of breathing, making it even more precise in determining
the movement and position of the tumor and in predicting how
much of the tumor can be targeted with the radiation, says
Santhanam.
The model is developed by taking a series
of scans of the lungs while the patient breathes and, much like
still frames assembling into film, the computer pieces together
the images to create a fluid model. Because the models are
designed to match each individual's physiology, this scanning
procedure is performed for every patient.
"This
technology has the capacity to become an essential tool in
gaining fundamental knowledge of functional anatomy-not just
structural anatomy," says Rolland.
"There is a huge need for future medical students to understand
physiology and pathologies beyond static models. The idea is to
use these models to learn faster". "The precision of the model
also gives the doctor the ability to react to what they're
seeing and make decisions quickly," adds Santhanam.
Rolland and
Santhanam are already looking to apply this technology into
other areas of medical modeling in the future including the
liver, heart and prostate.
Update:
Patrick Kupelian, MD Anderson PI; Jannick Rolland & Anand Santhanam, UCF co-PIs (2008-2010)
The joint grant from M. D. Anderson and the Florida High Tech Corridor Council
totaled more than $150,000, which includes funding for the researchers and the
four UCF graduate students involved in the project.
A first joint grant from M. D. Anderson and the Florida High Tech Corridor Council
(2006-2010) totaled $150,000, in support of Dr. Anand Santhanam to take this project clinical.