Dr. Priti Madhav Profile

Dr. Priti Madhav

Lead Engineer at GE Healthcare

SPIE Involvement:

Author

Publications (12)

Proceedings Article | 3 March 2012 Paper

Feasibility study to demonstrate cardiac imaging using fast kVp switching dual-energy computed tomography: phantom study

Priti Madhav, Yasuhiro Imai, Suresh Narayanan, Sandeep Dutta, Naveen Chandra, Jiang Hsieh

Proceedings Volume 8313, 83132Y (2012) https://doi.org/10.1117/12.911526

KEYWORDS: Iodine, X-ray computed tomography, Cardiac imaging, Computed tomography, Dual energy imaging, Arteries, Visualization, Heart, Switching, X-rays

Read Abstract +

Proceedings Article | 29 February 2012 Paper

Evaluation of low contrast detectability performance using two-alternative forced choice method on computed tomography dose reduction algorithms

Jiahua Fan, Priti Madhav, Paavana Sainath, Ximiao Cao, Haifeng Wu, Roy Nilsen, Adam Budde, Girijesh Yadava, Jean-Baptiste Thibault, Jiang Hsieh

Proceedings Volume 8318, 83181F (2012) https://doi.org/10.1117/12.910754

KEYWORDS: Reconstruction algorithms, Image quality, LCDs, Computed tomography, X-ray computed tomography, Infrared imaging, Medical imaging, Optical filters, Image processing, Algorithm development

Read Abstract +

Proceedings Article | 17 March 2011 Paper

Detailed characterization of 2D and 3D scatter-to-primary ratios of various breast geometries using a dedicated CT mammotomography system

Jainil Shah, Jan Pachon, Priti Madhav, Martin Tornai

Proceedings Volume 7961, 796158 (2011) https://doi.org/10.1117/12.878809

KEYWORDS: Breast, 3D metrology, X-ray computed tomography, X-ray sources, Beam shaping, Signal attenuation, 3D acquisition, Tissues, Chest, Nipple

Read Abstract +

Proceedings Article | 19 March 2010 Paper

Development of in vivo characterization of breast tissues through absolute attenuation coefficients using dedicated cone-beam CT

Priti Madhav, Christina Li, Martin Tornai

Proceedings Volume 7622, 762209 (2010) https://doi.org/10.1117/12.845064

KEYWORDS: Signal attenuation, Breast, Tissues, X-ray computed tomography, X-rays, In vivo imaging, X-ray imaging, Sensors, Imaging systems, Scatter measurement

Read Abstract +

Proceedings Article | 14 March 2009 Paper

Initial investigation of novel trajectories to improve chest wall imaging in a dedicated breast computed tomography system

Dominic Crotty, Randolph McKinley, Priti Madhav, Spencer Cutler, Martin Tornai

Proceedings Volume 7258, 72585L (2009) https://doi.org/10.1117/12.812500

KEYWORDS: Breast, Imaging systems, Chest, Optical spheres, Head, X-rays, Image quality, X-ray computed tomography, Computer aided design, Visualization

Read Abstract +

Proceedings Article | 21 March 2007 Paper

Investigating novel patient bed designs for use in a hybrid dual-modality dedicated 3D breast imaging system

Dominic Crotty, Priti Madhav, Randolph McKinley, Martin Tornai

Proceedings Volume 6510, 65101H (2007) https://doi.org/10.1117/12.713764

KEYWORDS: Imaging systems, Breast, Computer aided design, Single photon emission computed tomography, Chest, Sensors, X-ray computed tomography, 3D image processing, X-rays, Solid modeling

Read Abstract +

Proceedings Article | 21 March 2007 Paper

Evaluation of lesion distortion at various CT system tilts in the development of a hybrid system for dedicated mammotomography

Priti Madhav, Dominic Crotty, Randolph McKinley, Martin Tornai

Proceedings Volume 6510, 65101F (2007) https://doi.org/10.1117/12.713541

KEYWORDS: Breast, Imaging systems, Modulation transfer functions, Distortion, Single photon emission computed tomography, Optical spheres, Spherical lenses, 3D image processing, Reconstruction algorithms, 3D acquisition

Read Abstract +

A hybrid SPECT-CT system for dedicated 3D breast imaging (mammotomography) is currently under development. Each imaging system will be placed on top of a single rotation stage and moved in unison azimuthally, with the SPECT system additionally capable of polar and radial motions. In this initial prototype, the CT system will initially be positioned at a fixed polar tilt. Using a phantom with three tungsten wires, the MTF of the CT system was measured in 3D for different CT system tilts. A phantom with uniformly arranged 0.5cm diameter acrylic spheres was suspended in air in the CT field of view, and also placed at multiple locations and orientations inside an oil-filled breast phantom to evaluate the effect of CT system tilt on lesion visibility and distortion. Projection images were collected using various simple circular orbits with fixed polar tilts ranging between ±15°, and complex 3D saddle trajectories including combined polar and azimuthal motions at maximum polar tilt angles. Reconstructions were performed using an iterative reconstruction algorithm on 4x4 binned projection images with 0.508mm3 voxels. There was minor variation in the MTF in the imaged volume for the CT system at all trajectories, potentially due to the use of an iterative reconstruction algorithm. Results from the spherical cross phantoms indicated that there was more reconstruction inaccuracy and geometric distortion in the reconstructed slices with simple circular orbits with fixed tilt in contrast to complex 3D trajectories. Line profiles further showed a cupping artifact in planes farther away from the flat plane of the x-ray cone beam placed at different tilts. However, this cupping artifact was not seen for images acquired with complex 3D trajectories. This indicated that cupping artifacts can also be caused by undersampled cone beam data. These findings generally indicate that despite insufficient sampling with the cone beam imaging geometry, it is possible to place the CT system at a stationary polar tilt with the CT tube positioned upward such that a patient can be comfortably placed above the system and allow complete sampling near the top of the pendant, uncompressed breast and chest wall. However, a complex 3D trajectory allows for more complete sampling of the entire image volume.

Proceedings Article | 14 March 2007 Paper

Analysis of patient bed positioning in SPECT-CT imaging for dedicated mammotomography

Kristy Perez, Priti Madhav, Dominic Crotty, Martin Tornai

Proceedings Volume 6510, 651037 (2007) https://doi.org/10.1117/12.713822

KEYWORDS: Breast, Imaging systems, Single photon emission computed tomography, Computed tomography, X-ray computed tomography, 3D image processing, Solids, Image resolution, Reconstruction algorithms, Breast imaging

Read Abstract +

Proceedings Article | 10 March 2006 Paper

Initial comparison of registration and fusion of SPECT-CmT mammotomography images

Esther Dura, Priti Madhav, Spencer Cutler, Timothy Turkington, Martin Tornai

Proceedings Volume 6144, 614438 (2006) https://doi.org/10.1117/12.654477

KEYWORDS: Image registration, Single photon emission computed tomography, Breast, Image fusion, Visualization, Signal attenuation, 3D image processing, Image segmentation, Mammography, Image resolution

Read Abstract +

A hybrid, dual modality single photon emission computed tomography (SPECT) and x-ray computed mammotomography (CmT) scanner for dedicated breast and axillary imaging is under development. CmT imaging provides high resolution anatomical images, whereas SPECT provides functional images albeit with coarser resolution. As is being seen clinically in whole body imaging, integration of the images is expected to enhance (visually) and improve (with attenuation correction of SPECT) information provided by either modality for the detection, characterization and potentially staging of breast cancer. The registration of these images considers variations in object positions between the different modalities and imaging parameters (pixel size, conditions of acquisition, scan limitations). Automatic methods can be used which find the geometric transformations of the different imaging modalities involved. Here we demonstrate the initial stages of iterative 2-dimensional registration and fusion of SPECT with parallel beam geometry and CmT with offset cone-beam acquisition geometry for mammotomography with images acquired and reconstructed independently on each system. Two registration algorithms are considered: the first is an intrinsic correlation, Mutual Information (MI) method based on intrinsic image content; the second is a rigid body transform method, Iterative Closest Point (ICP) method based on identification of fiducial markers visible to both emission (SPECT) and transmission (CmT) imaging modalities. Experiments include use of a geometric resolution/frequency phantom imaged under different conditions, and two different anthropomorphic breast phantom sizes (325 and 935mL). Initial results with the geometric phantom demonstrate that MI can be misled by highly symmetric features, and ICP using control points is more accurate to within fractions of a voxel. Initial breast phantom studies indicate that object size and SPECT resolution limitations may contribute to registration errors.

Proceedings Article | 2 March 2006 Paper

A novel method to characterize the MTF in 3D for computed mammotomography

Priti Madhav, Randolph McKinley, Ehsan Samei, James Bowsher, Martin Tornai

Proceedings Volume 6142, 61421Y (2006) https://doi.org/10.1117/12.653393

KEYWORDS: Modulation transfer functions, 3D metrology, Tungsten, Imaging systems, 3D image processing, Breast, Reconstruction algorithms, Image resolution, Sensors, Computed tomography

Read Abstract +

Proceedings Article | 20 April 2005 Paper

Investigation of cone-beam acquisitions implemented using a novel dedicated mammotomography system with unique arbitrary orbit capability

Randolph McKinley, Caryl Bryzmialkiewicz, Priti Madhav, Martin Tornai

Proceedings Volume 5745, (2005) https://doi.org/10.1117/12.596089

KEYWORDS: Breast, Distortion, Chest, Imaging systems, Computing systems, 3D image reconstruction, 3D acquisition, 3D image processing, Breast imaging, Sensors

Read Abstract +

Proceedings Article | 20 April 2005 Paper

Design and development of a fully 3D dedicated x-ray computed mammotomography system

Martin Tornai, Randolph McKinley, Caryl Bryzmialkiewicz, Priti Madhav, Spencer Cutler, Dominic Crotty, James Bowsher, Ehsan Samei, Carey Floyd

Proceedings Volume 5745, (2005) https://doi.org/10.1117/12.595636

KEYWORDS: Breast, Imaging systems, X-rays, Computing systems, X-ray detectors, X-ray imaging, Sensors, Reconstruction algorithms, Prototyping, Distortion

Read Abstract +

Showing 5 of 12 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years