Image Viewing Tool (PVIEW)

Multi-purpose medical image processing tool Image viewing and reporting Image correlation and fusion Image format conversions Optional DICOM Server

Brochure   |    User Guide

[Case Gallery - Preclinical Imaging]

Image Viewing and Documentation. The PMOD viewing tool allows to load a set of image studies in various formats. One of these studies can be reviewed alone, or up to three in parallel. Matched studies may be fully synchronized and presented as fusion images. Many flexible features are available for exploring and arranging the images, and the results can be printed, documented as DICOM SC objects, or saved as JPEG files.

Image Format Conversions. Several different formats are supported, and data loaded in one format can be saved in another. This flexibility makes the PMOD tools suitable for most environments. As the DICOM C-STORE operation is a standard way of saving images, PMOD has even been used for converting proprietary data to DICOM for archival in PACS systems, or for importing images into radiotherapy planning environments.

Image Processing. The PVIEW tool is also a handy and flexible utility to prepare images in a multitude of ways for further processing. Besides more common functions it is even possible to merge several individual studies in the time or the axial domain. Hereby, a dynamic study can be formed, or one with a larger extent in the z direction.

Belongs to Core PMOD Functionality. All PMOD tools share the same load and save functionality. This is also true for image display: Whenever an image is shown, all viewing and processing capabilities are available. Each image display window has buttons to immediately start a volume-of-interest analysis, view the images in a full-screen format, or to generate and print a report.

Volumes of Interest Analysis

3D VOI definition and evaluation Time-activity curve generation Statistics calculation and export Masking inside and outside of VOI

Define Volumes-of-Interest (VOI). Quantitative and semi-quantitative analyses in Nuclear Medicine are usually based on the activity distribution in tissue regions assumed to be homogeneous. The PMOD VOI functionality provides a quick and flexible way to define VOIs on images, and perform essential operations on them. Besides VOIs composed of manually outlined polygons, regular objects are readily available. As the VOI definition is based on real-world coordinates, it is independent of the pixel size. Consequently, the same VOI definition can be applied to matched studies of different resolution such as PET/CT.

Evaluate/Manipulate the VOI Pixels. The pixel distribution within the VOIs can directly be analyzed and the statistical measures such as mean, standard deviation etc. exported to a text file. An alternative is to dump the VOI pixel values themselves to a file in order to perform more involved statistics with a dedicated tool such as SAS. Support for the kinetic analysis of dynamic acquisitions is ideal: after calculating the VOI averages over time, the resulting time-activity curves can directly be submitted to the kinetic modeling tool. A further application of interest is the generation of „phantom images“ by filling the interior or exterior of VOIs with specific values.

Belongs to Core PMOD Functionality. All PMOD tools have the capability of VOI analysis built in. Whenever an image is shown, it can be opened in the fully functional VOI tool by a simple button click.

Statistical Features

Calculate and export VOI statistics (mean, stdv, volume, etc.) VOI statistics on multiple files Dump pixel values per VOI for external analysis