• Topic ID: id_16157663
  • Version: 3.0
  • Date: Jun 10, 2020 2:42:28 AM

48cm Phantom Image Series Verification

Prerequisites

1 Acquiring the 48cm Phantom Image Series

Procedure

  1. Mount the Phantom Holder on the head-end of the table.
  2. Mount the 48cm Phantom on the Phantom Holder.
  3. Align, level, and center the 48cm Phantom.

    • Align phantom using the internal laser lights.

    • Level phantom using bubble level and the Z Axis knob on the Phantom Holder.

    • Center phantom using the CENTER PHANTOM utility in the left head SCANNER UTILITIES selection and the X and Y Axis knobs on the Phantom Holder.

  4. Set up the system to scan a four scan, 16 image, 48cm Phantom image series.

    MANUAL SCAN PROTOCOL SETUP

    Refer toTable 2 and setup an Axial scan with the parameters as shown.

    AUTO SCAN PROTOCOL SETUP

    1. On the Exam Rx desktop, select NEW PATIENT.

    2. Type the following entries in the two listed Patient Information fields:

      Patient ID: Service

      Name: 48cm Phantom Image Series

    3. From the Protocol Selection display, click on the Service Tab under Anatomical Selector.

    4. On the Service Protocol Selection window, click on MANUFACTURING.

    5. On the Service Category Protocol List, click on the 40.10 IMAGE SERIES 48CM selection for 4/8 slice system; click on the 45.7 IMAGE SERIES 48CM selection for 16 slice system.

    6. On the ExamRx protocol parameter display, select the 1st Series for 4/8 slice system (Series Description: QA1 MTF 2x10/120kV/260mA/1s);

      select the 3rd Series for 16 slice system(Series Description: 48 16x1.25/120kV/200mA/2s

    7. Set internal Landmark.

  5. Set internal Landmark.
  6. Acquire a four-scan, 16 image, 48 cm Phantom image series.

2 Brightness Uniformity and Noise

Procedure

  1. Specifications:

    Each Row (2A, 1A, 1B, and 2B) of the series must pass 48cm Brightness Uniformity and Noise (for the first series scan parameters) specifications:

  2. Recommended Failure Recovery:
    1. Perform DETAILED CAL.
    2. Perform AUTO CT# ADJUST.
    3. Repeat this procedure to verify 48cm Phantom Image Performance.

3 Finalization

No finalization steps.