Abstract: The invention provides a bowl. The bowl is provided with at least one grip ring, which grip ring is in the form of a first groove formed into the surface of the bowl and a second groove formed into the surface of the first groove, and a resiliently deformable or elastic band which fits into the second groove such the surface of the band is flush with or slightly proud of the surface of the first groove.

Abstract: The invention provides a bowl. The bowl is provided with at least one grip ring, which grip ring is in the form of a first groove formed into the surface of the bowl and a second groove formed into the surface of the first groove, and a resiliently deformable or elastic band which fits into the second groove such the surface of the band is flush with or slightly proud of the surface of the first groove.

Abstract: A method for verifying the modulation depth of a digital radiographic read out system. The system reads a radiation image by line-wise scanning a photostimulable phosphor screen that has been exposed to the radiation image. The radiation image includes an image of a phantom that has at least one x-ray opaque grating with parallel lines and a stepwise evolving spatial frequency. SWR values are determined by analyzing the x-ray image of the phantom. These SWR values are compared with acceptance values and the results of the comparison are used to adjust the scanning read out system.

Abstract: In reproducing medical images which are supplied in digital form and which vary in size, a web-like reproducing material is used. The reproducing material is cut at variable lengths in correspondence with the sizes of the images.

Abstract: A method for quantitative verification of line-wise scanning geometry in a digital radiographic read out system. An x-ray transparent phantom substrate with an embedded ruler having a number of equidistant parallel strips that are opaque on top of a photostimulable phosphor screen so that the ruler is parallel with the direction of line-wise scanning. After x-ray exposure and scanning, the position in the scanning direction of the center of each ruler strip is computed. At least one of the following parameters is determined: average pixel sampling distance, geometric distortion value, and total scanned width.

Abstract: A radiographic image read out system having on-line performance verification. A number of parameters to be used in a test program are stored together with (a) limiting value(s) for (a) characteristic value(s) resulting from application of the test program. An image signal of a phantom is processed according to the test program to determine at least one characteristic value. At least one limiting value for each determined characteristic value is retrieved from storage and a hard copy of the image of the phantom along with the at least one characteristic value in relation to the limiting value(s) is produced.