PHY16 Mechanical Scanning Methods

Mechanical Scanning Methods Recording of ultrasound B-images of a simple specimen with two ultrasound probes of different frequencies using a computer-controlled scanner Using a computer-controlled scanner, ultrasound B-images of a simple specimen are recorded using two ultrasound probes of different frequencies. The image quality of the B-images is analyzed with regard to focus zone, resolution and possible artifacts. Keywords: Ultrasound echography, A-image, B-image, resolution, image artifacts To obtain a B-image with an ultrasound transducer, the transducer or the sound beam must be moved along the desired cutting line. Compared to a hand-held scanning procedure, mechanical and electronic scanning methods offer better image quality due to good resolution and freely selectable line density. Due to the low frame rate, however, electronic multi-element scanners are used for real-time images and moving structures. By using ultrasound probes of different frequencies in combination with mechanically guided uniform scanning, the lateral frequency-dependent resolution can be examined and evaluated in the experiment in addition to the axial resolution. Screenshot of the measurement software in B-mode Scan with 2 MHz probe   The figure shows the B-scan of an acrylic block with holes of different sizes and arrangements, recorded with a 2 MHz probe. By examining it in a water bath, with the holes filled with water, echoes from both the upper and lower edges of the holes can be seen. The acoustic shadows of the holes above are visible in the bottom echo. SCOPE OF DELIVERY: Item No. Designation 10400 Ultrasonic echoscope GS200 10151 Ultrasonic probes 1 MHz 10152 Ultrasonic probes 2 MHz 10201 Test block (transparent) 10204 – optional: test block (black) 60200 CT scanner 60210 CT control 60120 CT measuring tank 70200 Ultrasound gel ADDITIONAL EXPERIMENTS: PHY08 Ultrasound B-scan PHY10 Sound field characteristics PHY20 Determination of the focus zone IND08 Defect testing MED02 Ultrasound examinations on the breast model (mammography)