| 1. |
- Gustafsson, Mikael, et al.
(författare)
-
A distributed image-processing system for measurements of intracellular calcium in living cells
- 1991
-
Ingår i: Computer Methods and Programs in Biomedicine. - : Elsevier. - 0169-2607 .- 1872-7565. ; 36:4, s. 199-221
-
Tidskriftsartikel (refereegranskat)abstract
- During the last decade, image-processing techniques have been introduced as a valuable tool in biologically oriented research. In combination with novel fluorescent probes, these techniques permit assessment of subcellular distributions of several intracellularly important cations, such as free calcium ions and protons. Typically, systems used for image processing are located centrally around the experimental setup. This configuration has drawbacks, mainly because the laborious extraction and processing of data that generally follow an experimental session limits the access to the system for other investigators. We describe here the principles of a distributed image processing system, based on IBM-compatible personal computers (PCs), that without extra hardware can cope with all the necessary image processing involved in imaging of intracellular cations. The potential of the PC as an image processor, however, reaches beyond this specific application and many image processing tasks can be carried out successfully on a standard PC. Thus, the centrally located dedicated image processor is used only for image acquisition in the experimental situation. This in turn optimizes the utilization of expensive resources and increases efficiency. The mouse-operated software is described in detail, so that interested investigators can extract useful parts for integration into their own applications and experimental environment.
|
|
| 2. |
- Sandborg, Michael, 1961-, et al.
(författare)
-
A Monte Carlo program for the calculation of contrast, noise and absorbed dose in diagnostic radiology
- 1994
-
Ingår i: Computer Methods and Programs in Biomedicine. - : Elsevier BV. - 0169-2607 .- 1872-7565. ; 42:3, s. 167-180
-
Tidskriftsartikel (refereegranskat)abstract
- A Monte Carlo computer program has been developed for the simulation of X-ray photon transport in diagnostic X-ray examinations. The simulation takes account of the incident photon energy spectrum and includes a phantom (representing the patient), an anti-scatter grid and an image receptor. The primary objective for developing the program was to study and optimise the design of anti-scatter grids. The program estimates image quality in terms of contrast and signal-to-noise ratio, and radiation risk in terms of mean absorbed dose in the patient. It therefore serves as a tool for the optimisation of the radiographic procedure. A description is given of the program and the variance-reduction techniques used. The computational method was validated by comparison with measurements and other Monte Carlo simulations.
|
|
| 3. |
- Smedby, Örjan
(författare)
-
A scanning system for digital analysis of cineangiography films
- 1992
-
Ingår i: Computer Methods and Programs in Biomedicine. - 0169-2607 .- 1872-7565. ; 39:1-2, s. 103-111
-
Tidskriftsartikel (refereegranskat)abstract
- A system for scanning and digital analysis of cinefilms is presented and its performance is compared with entirely digital radiographic equipment. Apart from the difference between logarithmic and linear gray-scale representation, a higher noise level was found in the scanning system. When its spatial resolution was assessed visually, it was comparable to that of the digital system, although lower than when the cinefilming and scanning steps were evaluated separately. Algorithms for the correction of varying exposure and geometric ("pin-cushion") distortion are also presented. It is concluded that digital analysis after scanning of cinefilms can be a useful alternative to completely digital cineradiographic studies.
|
|
| 4. |
- BORALV, E, et al.
(författare)
-
DOCUMENTATION AND INFORMATION-SERVICES IN THE HELIOS PROJECT
- 1994
-
Ingår i: COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE. - 0169-2607. ; 45, s. S139-S145
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- In a modern software project large amounts of documentation is produced. All parts of the complex software system require extensive documentation--both for reference purposes and promotional reasons. However, there are some aspects that often are forgotten or badly implemented; (i) the availability of on-line documentation, (ii) integration of the different formats of documentation, and (iii) the world wide promotional aspect. To solve these problems, the Helios project has chosen to integrate its public documentation and software material into a hypertext system using the World Wide Web.
|
|
| 5. |
- BORALV, E, et al.
(författare)
-
USABILITY AND EFFICIENCY - THE HELIOS APPROACH TO DEVELOPMENT OF USER INTERFACES
- 1994
-
Ingår i: COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE. - 0169-2607. ; 45, s. S47-S64
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- This paper describes the user interface related services of the HELIOS project. The design and implementation of efficient user interfaces is a prerequisite for successful introduction of computer support in health care ward units. Design principles must be based on a basic understanding of cognitive aspects of human-computer interaction, as well as on detailed knowledge about the specific needs and requirements of the health care professionals. In the HELIOS project, a style guide for design of user interfaces has been developed. The style guide defines detailed design guide-lines together with a set of interface elements specified for the ward domain. Development tools for construction and implementation of user interfaces to ward applications have been developed and integrated into the HELIOS SEE. The tools are based on the TeleUSE product, which has been extended and adjusted to the HELIOS specifications. A set of new widgets, designed to implement health care interface elements, has been incorporated into the development tool.
|
|
| 6. |
|
|
| 7. |
|
|
| 8. |
- DEGOULET, P, et al.
(författare)
-
THE HELIOS MEDICAL SOFTWARE ENGINEERING ENVIRONMENT
- 1994
-
Ingår i: COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE. - : ELSEVIER SCI PUBL IRELAND LTD. - 0169-2607. ; 45:1-2, s. 91-95
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The aim of the HELIOS project is to create an integrated Software Engineering Environment (SEE) to facilitate the development and maintenance of medical applications. HELIOS is made of a set of software components, communicating through a software bus cal
|
|
| 9. |
- LEMAITRE, D, et al.
(författare)
-
ARTEMIS-2 - AN APPLICATION DEVELOPMENT EXPERIMENT WITH THE HELIOS ENVIRONMENT
- 1994
-
Ingår i: COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE. - : ELSEVIER SCI PUBL IRELAND LTD. - 0169-2607. ; 45, s. S127-S138
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- A medical application is a highly complex system that embraces many data types and a very large number of data processing functions and methods. The development of integrated software engineering environments has deeply changed the conception of applicati
|
|
| 10. |
|
|
| 11. |
|
|
| 12. |
|
|
| 13. |
|
|
| 14. |
|
|
| 15. |
- Svahn, Gudmund, et al.
(författare)
-
PACS for radiology conferences--improvement of application software
- 1994
-
Ingår i: Computer Methods and Programs in Biomedicine. - 0169-2607. ; 43:1-2, s. 81-84
-
Tidskriftsartikel (refereegranskat)abstract
- The introduction of PACS in a radiology department means that most functions that are available in the film-based system must be included. One important function is the radiology conference. The handling and application programs of digital workstations are normally not developed for demonstrations of many images in a limited time. This paper describes a workstation with specially designed software for radiology conferences. The application is separated in preparation and presentation of the cases to be demonstrated. Very fast image handling is achieved during the conference because the function is based on the principle of prefetching of the selected images. The images are presented on a large screen with high resolution. The experiences of digital radiology conferences are good. However, reference films from previous examinations create extra work because they have to be shown on the conventional lightbox.
|
|
| 16. |
|
|
| 17. |
|
|
