QC Report

Weekly MRI Equipment Quality Control for Large ACR Phantom

Quality control (QC) of the human MRI scanners is essential to ensure optimalimage acquisition. In order to acieve this purpose, our center performs the phantom QC test weekly according to the American College of Radiology (ACR) MRI accreditation procedure. Several important assessments of MR image quality are included as follows: geometric accuracy, high-contrast resolution, slice thickness accuracy, slice position accuracy, image intensity uniformity, percent signal ghosting, and low-contrast object detectability. In addition, signal-to-noise ratio and central frequency are monitored as well. Users are welcome/encouraged to check the QC results of the scanner before performing his/her studies.

ACR large QC phantom

 Total 11 axial images are used to assess MRI quality.

MRI Facility Name: FIBRE Siemen Prisma 3.0 T

Current Status:   PASS

ACR MRI QC Scan Parameters

Study Sagittal Locator Axial T1 Axial T2 double-echo
Pulse sequence Spin echo Spin echo Spin echo
TR (ms) 200 500 2000
TE (ms) 20 20 20/80
FOV (cm) 25 25 25
Slices 1 11 11
Slice thinkness(gap) (mm) 20(-) 5(5) 5(5)
NEX 1 1 1
Matrix 256×256 256×256 256×256
Acquision time (min:sec) 0:56 2:16 8:56

Localizer image

Geometric distortion measurement:

Example images acquired using ACR T1 protocol:

Artifact Evaluation:

Example images acquired using ACR T2 protocol

Artifact Evaluation:

Weekly QC Results:

Date Table Position Center Freq (MHz) TX Gain (V) Geometric Accuracy Measurements (Ax. Slice #5 Diameter) High-Contrast Spatial Resolution (Slice 1-Highest Resolved) Low-Contrast Detectability Artifact Evaluation Tested By Note
05-Dev-2024 123.258140 220.3 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
15-Nov-2024 123.258254 220.1 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
08-Nov-2024 123.258225 218.7 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
01-Nov-2024 123.258435 220.8 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
25-Oct-2024 123.258396 220.0 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
18-Oct-2024 123.258592 220.9 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
11-Oct-2024 123.258654 219.5 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
07-Oct-2024 123.258283 222.3 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
20-Sep-2024 123.258558 219.0 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
13-Sep-2024 123.258656 219.1 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
30-Aug-2024 123.258566 217.7 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
23-Aug-2024 123.258450 218.9 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
15-Aug-2024 123.258295 219.5 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
02-Aug-2024 123.258426 218.9 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
12-July-2024 123.257676 218.7 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
28-Jun-2024 123.258624 218.0 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
06-Jun-2024 123.258282 218.6 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
30-May-2024 123.258405 218.0 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
15-May-2024 123.258454 218.3 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
03-May-2024 123.257585 218.3 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
24-Apr-2024 123.258429 218.2 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
26-Jun-2023 123.257258 217.6 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
01-Jun-2023 123.257393 217.6 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
24-Apr-2023 123.257399 217.9 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
20-Mar-2023 123.257499 215.7 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
16-Feb-2023 123.257610 215.4 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
08-Feb-2023 123.257416 218.5 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
01-Feb-2023 123.257326 218.1 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
25-Jan-2023 123.257328 218.2 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A
12-Jan-2023 123.257330 217.3 T1: Pass; T2: Pass T1 UL: Pass; T1 LR: Pass; T2 UL: Pass; T2 LR: Pass T1: Pass; T2: Pass None R. Tain N/A