Definitions and terms

‘ACQ’ status

The status of the acquisition patient. As long as the patient has this status, images can be acquired.

There is only one patient with this status.

Acquisition

All X-ray techniques that acquire images. This can be using an image intensifier or directly on film.

Acquisition patient

Current patient of which images are acquired.

Archiving

Copying the screen contents of the examination monitor to paper, transparency film, video, video CD or DICOM.

Automatic fluoroscopy

Fluoroscopy in which the fluoroscopy parameters are specified and set during the installation of the system and are stored as Anatomically Programmed Fluoroscopy (APF) parameters.

Current image

The current image displayed on the examination monitor or the image highlighted by the square cursor in an overview display.

Dynamic viewing

Viewing with the run cycle function activated.

Examination monitor

This is the primary display for displaying live images, last image hold or post-processing.

Fluoroscopy

Acquisition technique using continuous radiation and an image intensifier and imaging chain to produce a live image on a monitor.

The images can be simply viewed live and not stored, or they can be stored in a patient file for future reference.

High Definition Fluoroscopy

Also called HDF. Used for a short period only, usually for recording to obtain the best possible images.

High Penetration mode

Also called HIP. An automatic mA increase.

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11.2 Definitions and terms

Intermittent fluoroscopy

Fluoroscopy that uses X-ray pulses instead of continuous radiation.

Interventional reference point

The interventional reference point is intended to be representative of the point of intersection of the X-ray beam axis and the patient. The display of dose rate and cumulative dose is valid for this distance.

The interventional reference point is 30 cm from the II entrance surface or 69.5 cm from the focal spot. (Ref. IEC 60601-2-43.)

Isokerma

A contour line on a scattered radiation diagram showing the boundary where a certain radiation level is exceeded.

LIH

Last Image Hold. The image of the last X-ray is displayed on the examination monitor.

Low Dose Fluoroscopy

Also called LDF. Used for C-arm (re)positioning and guiding purposes during catheterization procedures. The advantages over HDF are a reduced dose and no exposure time limitation.

Manual fluoroscopy

Fluoroscopy in which the fluoroscopy parameters (kV and storage speed) are set manually before acquisition commences.

Measurement

Determination of the angle and (relative) size of an object visible in the image.

Overview

Display of a 4 x 4 images matrix on the examination monitor.

Patient file

A file where acquired images can be stored. Each stored image obtains an identification consisting of a run and image number.

Examinations can only be stored if the memory extension option is present.

The maximum number depends on the memory extension size (50, 500 or 1,000 images).

Phantom

An object used for calibration and verification purposes.

Post-processing

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BV Libra Release 1.2 Glossary 1 1-5

Radiography

Direct acquisition of images on to cassette-film.

Real pulsed fluoroscopy mode

The real pulsed fluoroscopy mode enables the user to reduce the dose with 50%. This mode uses 12½ per second (50 Hz).

Reference monitor

This is the secondary display for images to use as a reference.

‘REV’ status

The moment the images of a patient are reviewed, it will get the ‘REV’

status. The patient will keep this status until another patient is reviewed.

There is only one patient with this status.

Reviewing

Looking at and post-processing images after an examination is terminated.

Run cycle

Dynamic review of images within one run.

‘SCH’ status

A patient has the ‘SCH’ status prompt after input of the patient data. The patient will retain this status until acquisition is performed.

Static viewing

Viewing with the run cycle function deactivated.

Status

There are four statuses of the patient, displayed in the ‘Patient administration’ page, namely ‘SCH’, ‘ACQ’, ‘REV’ and closed.

Subtraction

Display of (live) mask-subtracted fluoroscopy images.

Viewing

Looking at images during and/or just after the acquisition run.

Viewing patient

Patient of which images are viewed or post-processed etc.

Zoom

An optional post-processing feature to enlarge a part of the current image.

Magnification factor is 2.

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11.2 Definitions and terms

BV Libra Release 1.2 Glossary 11-7

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11.3

Legend

C-arm stand height adjustment Foot switch

Hand switch

Mobile viewing station console 36

34

A System On 10 X-mode - Continuous

B C-arm stand Off 11 X-mode - Real pulsed fluoro

1 Manual kV 12 X-mode - Intermittent

2 Information 13 Radiography (iris and 24 cm format)

3 Print image 14 Move iris

4 LAT on/off 14a Reset iris

5 Park image 15 Move shutter(s)

6 Protect image 15a Reset shutter(s) movement

7 Rotate image 16 Rotate shutter(s)

7a Reset rotation 16a Reset shutter(s) rotation

8 Scan reverse 17 Select right shutter

9a II size - small 18 Select left shutter

9b II size - middle 19 Reset 5 minutes fluoroscopy timer

9c II size - large 20 Soft-keys

Mobile viewing station

C System Off 27 Contrast/brightness

D System On 28 Invert image

21 Keyboard 29 Remask

21a Enter 30 Protect image/run

21b Delete 31 VCR replay

21c Compose 32 Park image

22 Patient administration 33 Previous/next image/run

23 Help 34 Trackball

24 Post-processing 35 Undo

25 Run cycle 36 Accept

26 Overview

C-arm stand height movement

37 Up 38 Down

Hand Switch

39 Low Dose Fluoroscopy / Radiography 40 High Definition Fluoroscopy

Foot switch

41 Low Dose Fluoroscopy 43 Mode switch

42 High Definition Fluoroscopy