Comparison and evaluation of retrospective intermodality brain image registration techniques

…, B Harkness, PF Hemler… - Journal of computer …, 1997 - journals.lww.com
Purpose: The primary objective of this study is to perform a blinded evaluation of a group of
retrospective image registration techniques using as a gold standard a prospective, marker-…

Grey value correlation techniques used for automatic matching of CT and MR brain and spine images

…, EJD Pol, TS Sumanaweera, PF Hemler… - Visualization in …, 1994 - spiedigitallibrary.org
Grey value correlation is generally considered not to be applicable to matching of images of
different modalities. In this paper we will demonstrate that, with a simple preprocessing step …

Comparison and evaluation of retrospective intermodality image registration techniques

…, PA Van den Elsen, PF Hemler… - Medical Imaging …, 1996 - spiedigitallibrary.org
All retrospective image registration methods have attached to them some intrinsic estimate of
registration error. However, this estimate of accuracy may not always be a good indicator of …

Stereotactic localization of breast lesions: how it works and methods to improve accuracy

JJ Carr, PF Hemler, PW Halford, RI Freimanis… - Radiographics, 2001 - pubs.rsna.org
A computer simulation of stereotactic breast biopsy was developed that paralleled the geometric
configuration of a currently available breast biopsy system. This model was developed …

Radio frequency ablation registration, segmentation, and fusion tool

ES McCreedy, R Cheng, PF Hemler… - IEEE Transactions …, 2006 - ieeexplore.ieee.org
The radio frequency ablation segmentation tool (RFAST) is a software application
developed using the National Institutes of Health's medical image processing analysis and …

MR geometric distortion correction for improved frame‐based stereotaxic target localization accuracy

T Sumanaweera, GH Glover, PF Hemler… - Magnetic resonance …, 1995 - Wiley Online Library
We present a method to correct the geometric distortion caused by field inhomogeneity in
MR images of patients wearing MR‐compatible Stereotaxic frames. Our previously published …

Registration error quantification of a surface‐based multimodality image fusion system

PF Hemler, S Napel, TS Sumanaweera… - Medical …, 1995 - Wiley Online Library
This paper presents a new reference data set and associated quantification methodology to
asses the accuracy of registration of computerized tomography (CT) and magnetic‐…

A versatile system for multimodality image fusion

PF Hemler, TS Sumanaweera… - Journal of image …, 1995 - Taylor & Francis
This paper presents a versatile system for registering and visualizing computed tomography
and magnetic resonance images. The system utilizes a semi-automatic, surface-based …

Lymph node segmentation using active contours

…, Y Ge, WE Snyder, PF Hemler… - … Imaging 1997: Image …, 1997 - spiedigitallibrary.org
Node volume analysis is very important medically. An automatic method of segmenting the
node in spiral CT x-ray images is needed to produce accurate, consistent, and efficient …

Freeflight: A virtual endoscopy system

DJ Vining, DR Stelts, DK Ahn, PF Hemler, Y Ge… - CVRMed-MRCAS'97 …, 1997 - Springer
We created a virtual endoscopy system, called FreeFlight, that interactively generates three-dimensional
endoscopic images of human anatomy using spiral CT data. The software is …