The KISMET Volume Visualization Page

[Intro] [Technical Background] [Image Gallery] [Contact Address]


Introduction

This page is intended to give you an impression of KISMET's capabilities on the field of fast and accurate Volume Visualization. We are offering some examples of our actual work here.

Application fields:


Technical background

KISMET uses the 3D-texturing technique for the volume reconstruction. This requires some special rendering hardware, as it is offered for example by several Silicon Graphics workstations (Onyx VTX / RE2, Indigo Impact)

Our actual hardware equipment:

Data acquisition:

Rendering speed:

Possible data manipulations:


Image Gallery

Here you can see some examples of our work. Keep in mind, that it is much more impressive to see it in real-time than just having some snapshots!

KISMET User Interface with opened Volume Visualization menus

User Interface (960x768 jpg, 124k)


Three examples of how the display can be influenced by changing the transfer functions. The three following images are all derived from the same CT data set.

(original data courtesy by General Electric)

CT head: surface reconstruction (766x613 jpg, 28k)

CT head: MIP (maximum intensity projection) (766x613 jpg, 18k)

CT head: bone reconstruction (766x613 jpg, 28k)


Once again the same data, but this time clipping is applied to present only the lower part of the jaw.

CT head: lower jaw bone structure (536x414 jpg, 56k)


MR data of head with a tumor in the pituitary gland region (big yellow object in the middle), using a colorized transfer function.

MR head: tumor in the pituitary gland region (755x605 jpg, 151k)



The data used in the following four images were taken from Research System's Visible Human CD, a collection of data provided by the National Library of Medecine's 'Visible Human Project'.
You can see the wide range of possible volume representations longing from MR- and CT greyvalue data to photographic true-color images.

MR examination of thorax with two double oblique clipping planes applied (639x511 jpg, 32k)

MR (proton density weighted) of head (639x511 jpg, 25k)

full color reconstruction, clipped twice (766x613 jpg, 45k)

just another part of the 'Visible Human' (766x613 jpg, 37k)



Now have a look at our synthetic MRI examination room! This model, completely designed with KISMET, shows a patient, lying on the MRI-examination desk with a remote manipulator device at its head-end.

Synthetic MRI room (960x768 jpg, 46k)
Remote manipulator (766x613 jpg, 33k)



The next two images show one of KISMET's most powerful features: It is possible to easily combine true volume data with CAD-type surface data.
On the first image you see a model of a biopsy-configuration whereas on the second one you can find the corresponding volume reconstruction with a biopsy needle positioned at the edge of a tumor.

Biopsy model (766x613 jpg, 26k)

MR volume with biopsy needle (766x613 jpg, 23k)



The creation of new medical simulation applications has become possible by combining KISMET's inherent capabilities concerning CAD modelling, force feedback functionality and volume visualization.

This is an example of a biopsy scenario. In contrary to the previous examples, here the manipulating device is controlled by the user handling the PHANToM force reflecting input device. At the current state of development, the user gets a sensation of a certain material-dependent friction while penetrating the volume with the needle.

More about our force reflection developments can be found at the KISMET force reflection pages.

Biopsy scenario (jpg, 195k)



Scientific information and contact address:

Dr.-Ing. U. Kühnapfel
Forschungszentrum Karlsruhe GmbH
Institut für Angewandte Informatik
Postfach 3640
D-76021 Karlsruhe, FRG

E-mail : jet@iai.fzk.de
Voice : +49-(0)7247-82-2567
Fax : +49-(0)7247-82-5786

List of publications


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This page was maintained by Markus Hübner . Last modified March 26, 1997.
Feel free to send in comments and suggestions.
E-mail: jet@iai.fzk.de