GE Logiq P5 User Manual
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Quality Assurance LOGIQ 5 Basic User Manual 18-35 Direction 2300002-100 Rev. 2 Penetration DescriptionPenetration is the ability of an imaging system to detect and display weak echoes from small objects at large depths. See Figure 18-9 for more information. Penetration can be affected by the systems: • Transmitter/receiver • Degree of probe focusing • Attenuation of the medium • Depth and shape of reflecting object • Electromagnetic interference from local surroundings. BenefitWeak reflecting echoes are commonly produced from the internal structure of organs. Definition of this tissue texture is important in the interpretation of the ultrasound findings. MethodScan a phantom to see how echoes begin to fade as depth is increased. The maximum depth of penetration is the point at which homogeneous material in the phantom begins to lose brightness. ProcedureTo measure penetration: 1. Set the front panel TGC slide pots to their center (detent) position. 2. Gain and acoustic output can be adjusted, as necessary, since these values are displayed on the monitor. 3. Scan a test phantom along the vertical pin targets to typical depths for the probe being used. 4. Perform a standard distance measurement from the top of the image displayed to the point at which homogeneous material in the phantom begins to lose brightness. 5. Document the depth measurement for reference and future comparison. Contact a Service Engineer if the depth of penetration shifts more than one centimeter (1cm) when using the same probe and same system settings.
User Maintenance 18-36 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Functional resolution DescriptionFunctional resolution is an imaging systems ability to detect and display the size, shape, and depth of an anechoic structure, as opposed to a pin target. See Figure 18-9 for more information. The very best possible image is somewhat less important than reproducibility and stability over time. Routine tests at the same settings should produce the same results. BenefitThe data obtained will give a relative indication of the smallest structure the system is capable of resolving at a given depth. ProcedureTo measure functional resolution: 1. Set the front panel TGC slide pots to their center (detent) position. 2. Gain and acoustic output can be adjusted as necessary, since these values are displayed on the monitor. 3. Scan a test phantom with a vertical row of anechoic cyst targets to typical depths for the probe being used. 4. Evaluate the cysts at various depths for a good (round) shape, well-defined borders and no fill in. Remember, TGC slide pots are centered and should remain fixed. This may NOT provide optimal cystic clearing. 5. Document all results for future reference and comparison. Contact a Service Engineer if a greatly distorted image is obtained.
Quality Assurance LOGIQ 5 Basic User Manual 18-37 Direction 2300002-100 Rev. 2 Contrast resolution DescriptionContrast resolution is the ability of an imaging system to detect and display the shape and echogenic characteristics of a structure. See Figure 18-9 for more information. Specific values measured are less important than stability over time. Routine tests at the same settings should produce the same results. BenefitA correct diagnosis is dependent upon an imaging systems ability to differentiate between a cystic or solid structure versus echo patterns from normal surrounding tissue. MethodA phantom with echogenic targets of different sizes and depths should be used. ProcedureTo measure contrast resolution: 1. Set the front panel TGC slide pots to their center (detent) position. Set dynamic range to 54 db. 2. Gain and acoustic output can be adjusted, as necessary, since these values are displayed on the monitor. 3. Scan a test phantom with echogenic targets at the depths available. 4. Evaluate the echogenic targets for contrast between each other and between the surrounding phantom material. Remember, TGC slide pots are centered and should remain fixed. This may NOT provide an optimal scan image. 5. Document all results for future reference and comparison. Contact a Service Engineer if the echogenic characteristics or shapes of the targets appear distorted.
User Maintenance 18-38 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Gray Scale photography DescriptionPoor photography will cause loss of low level echoes and the lack of contrast between large amplitude echoes. See Figure 18-9 for more information. BenefitWhen photographic controls and film processors are properly adjusted, weak echoes, as well as strong echoes, are accurately recorded on film. Procedure1. Adjust the camera according to the manufacturers instructions until the hard copy and video display are equal. 2. Scan the phantom and its echogenic contrast targets. 3. Make a hard copy photograph of the display and compare it to the image on the video monitor for contrast and weak echo display. 4. Document all results for future reference and comparison. Contact a Service Engineer if camera cannot duplicate what is on the image monitor. NOTE: Optimization of brightness/contrast controls on the display monitor is imperative in order to make sure that the hardcopy and monitor look alike. The display monitor is adjusted first. The hardcopy camera or printer is adjusted to match the display monitor.
Quality Assurance LOGIQ 5 Basic User Manual 18-39 Direction 2300002-100 Rev. 2 Setting up a Record Keeping System Preparation The following is needed: • Quality Assurance binder. • Hard copy or electronic file of images. • Quality Assurance Checklists. • Display the following information while testing quality assurance: • Acoustic Output • Gain • Depth • Probe • Dynamic Range • Set up new patient to be the name of the test. • Annotate the following: • Any control where its value is NOT displayed. • Significant phantom information. Record Keeping Complete the following: 1. Fill out the Ultrasound Quality Assurance Checklist for each probe, as scheduled. 2. Make a hard copy or archive the image. 3. Compare images to baseline images and acceptable values. 4. Evaluate trends over previous test periods. 5. File hard copy or electronic file of images and checklist in Quality Assurance binder.
User Maintenance 18-40 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Ultrasound Quality Assurance Checklist (For Future Validation) Table 18-8: Ultrasound Quality Assurance Checklist (Part 1) Performed By Date System Serial Number Probe Type Probe Model Serial Number Phantom Model Serial Number Room Temperature Acoustic Output Gain Focal Zone Gray Map TGC Depth Monitor Setting Peripheral Settings Other Image Processing Control Settings Table 18-9: (Part 2) Te s t Baseline Va l ue Range Tested Va l u e Image Hardcopy/ Archived Acceptable? Yes/No Service Called (Date) Date Resolved Ve rti ca l Measurement Accuracy Horizontal Measurement Accuracy Axial Resolution Lateral Resolution Penetration Functional Resolution Contrast Resolution Gray Scale Photography
Assistance LOGIQ 5 Basic User Manual 18-41 Direction 2300002-100 Rev. 2 Assistance Supplies/Accessories The following supplies/accessories have been verified to be compatible with the system: Peripherals CAUTIONDO NOT connect any probes or accessories without approval by GE. Table 18-10: Peripherals and Accessories AccessoryUnits 3.5” MO Drive Each Sony VCR Model SVO-9500MD/9500MDP Each Panasonic VCR Model AG-MD835/MD835P/ MD835EEach Sony B/W Printer Model UP-895MDW Each Mitsubishi B&W Printer Model P91W/91E/ AP9500Each Sony Color Printer Model UP-2950MD/2850P Each Sony Color Printer Model UP-21MD/21MDS Each Mitsubishi Color Printer Model CP-900/900UM/ 900EEach Sony Color Printer Model UP-50/51MD Each
User Maintenance 18-42 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Console LOGIQ 5 Probes Table 18-11: Console Accessories AccessoryUnits Footswitch Each TV Probe Holder Each UPS (Battery Pack) Each Table 18-12: Probes and Accessories AccessoryUnits 3C Each 3.5C Each 5C Each E8C Each 8C Each 7L Each 10L Each 12L Each 3S Each P2D Each P6D Each
Assistance LOGIQ 5 Basic User Manual 18-43 Direction 2300002-100 Rev. 2 Gel Disinfectant Table 18-13: Gel AccessoryUnits Thermasonic Gel Warmer Holds three plastic bottles (250ml or 8 oz) Aquasonic 100 Scan Gel 5 liter jug 250 ml plastic bottles (12/ case) Scan Ultrasound Gel 8 oz plastic bottles (12/ case) 1 gallon plastic jug Four 1-gallon plastic jugs Table 18-14: Gel AccessoryUnits Aquasonic 100 Scan Gel 5 liter jug 250 ml plastic bottles (12/ case) Scan Ultrasound Gel 8 oz plastic bottles (12/ case) 1 gallon plastic jug Four 1-gallon plastic jugs Table 18-15: Disinfectant AccessoryUnits Cidex Activated Dialdehyde 16/1 quart bottles 4/1 gallon bottles 2/2.5 gallon bottles
User Maintenance 18-44 LOGIQ 5 Basic User Manual Direction 2300002-100 Rev. 2 Ultrasound Probe and Cord Sheath Sets Physio Accessories Patient Electrodes Contact the distributor, GE affiliate or sales representative for approved peripherals.Table 18-16: Probe and Cord Sheath Sets AccessoryUnits Sterile Ultrasound Probe Sheath Set 20 Per Set Sterile Ultrasound Cord Sheath Set 20 Per Set Sanitary Rectal/Vaginal Probe Cover 20 Per Set Sterile Combination Probe and Cord Cover Set 12 Per Set Sterile Ultrasound Probe Sheath Set for Wide (2.5 and 3.5) Aperture Sector Probes20 Per Set Table 18-17: Patient ECG Lead Wires AccessoryUnits Physio Input Panel Kit ECG Cables Set PCG Sensor Each Table 18-18: Patient ECG Lead Wires AccessoryUnits Adult Box/300 Pediatric Box/300 Adult/off center Box/500 Pediatric/off center Box/1000