3D Printed Cardiac Phantom for MR Imaging

Nimitha S L Reddy, Abhinav Karan
The cost effective cardiac phantom is to mimic the cardiac motion during Magnetic Resonance Imaging (MRI). Cardiac motion for the phantom is simulated using peristaltic pump. As the peristaltic pump is capable of forward flow and reverse flow, which leads to the benefit of both diastolic and systolic motion per cycle. The focus is to design a Graphical User Interface (GUI) which accepts the inputs from the user and correlate those inputs in to pump parameter. GUI accepts the input parameters
more » ... BPM, Stroke volume and Acquisition time. Depending on these inputs, the pump parameters like flow rate, forward time, reverse time and cycles per minute will be calculated and also display on UI. The calculated values will be updated in the peristaltic pump software and then pumping action takes place the fluid is sent to cardiac phantom for image acquisition. After imaging pot-processing is done using OsiriX tool, to get the output parameters. Obtained output parameters are given to GUI to plot the relation between Input and output parameters. Cardiac Phantom setup: The setup consisted of a laptop, peristaltic pump (Ravel Hiteks Pvt Ltd) and a 3D printed cardiac model . The laptop was connected to the pump and to the model through silicon pipes as shown in figure 1. One end of the pipe was connected to aortic arc and other end of the pipe was connected to left pulmonary artery. The laptop interfaced with the pump through a designed User Interface developed in Matlab (The Mathworks Inc). The UI inputs were clinically relevant parameters such as beats per minute (BPM), stroke volume (SV), cardiac output (CO) and acquisition time. These determined the pump parameters of flow rate, forward time, reverse time and number of cycles. UI outputs included BPM, volume, aortic flow, Left ventricular volume, Myocardial thickness and stress/strain as determined by MR images. The peristaltic pump was controlled to mimic the systolic and diastolic cycles. Pipes were inserted deeper into the ventricles to allow suction of water as required by peristaltic pump for stable operation.
doi:10.17148/ijireeice.2017.5515 fatcat:4j2v6ljb3jbflcrjg4jaww7yge