MedRadsQC

MedRadsQC - Universiti Sains Malaysia

MedRadsQC © – Radiography Quality Control system for Medical Radiation Instruments

by Herdi and Zahri, Universiti Sains Malaysia

Contact: Alamat emel ini dilindungi dari Spambot. Anda perlu hidupkan JavaScript untuk melihatnya.

Facility & Equipment Information

Location: Address: Equipment: Equipment type: Manufacturer: Model: System S/N: Date Tested:

1. Generator Performance Test

1.1 Repeatability of Radiation Output

Optimum Standard: (Coefficient of Variation (CoV): ≤ 5%)

Exposure Factor		Measured Readings
kV	mAs	kV	Dose





Mean
Standard Deviation (SD)
CoV (%)

Result: Pending

1.2 Accuracy of kVp

Set kV < 100kV (Maximum Deviation: ± 5kV)

Set kV	Measured	Dev (kV)

Set kV ≥ 100kV (Maximum Deviation: ± 5%)

Set kV	Measured	Dev (%)

Result: Pending

1.3 Accuracy of Exposure Timer

Timer < 0.1sec (Maximum Deviation: ≤ ±20%)

Set sec	Measured	Dev (%)

Timer ≥ 0.1sec (Maximum Deviation: ≤ ±10%)

Set sec	Measured	Dev (%)

Result: Pending

1.4 Coefficient of Linearity

Optimum Standard: (Coefficient of Linearity: ≤ 10%)

Set mA	Set mAs	Measured Dose	Dose / mAs










Coefficient of Linearity:

Result: Pending

2. X-ray Beam Filtration (HVL measurement)

kV Set	Measured HVL (mm)	Min Required (mm)	Finding

Reference Minimum HVL
kVp Set	Min. HVL (mm)
40	0.4
50	1.2
60	1.3
70	1.5
80	2.3
90	2.5
100	2.7
110	3.0
120	3.2
130	3.5
140	3.8
150	4.1

Result: Pending

3. X-ray Beam Limitation

3.1 Collimation Light Field Illumination

Limit: (Illumination: ≥ 160 lux)

R1 (lux)	R2 (lux)	R3 (lux)	R4 (lux)	Average (lux)

Result: Pending

3.2 X-ray Beam / Light Field Alignment

Limit: (Maximum misalignment ≤ 1% of FID on any one side)

Axis Plane	FID (cm)	Measured Deviation (cm)	Max Allowed (cm)
Parallel
Perpendicular

Result: Pending

4. Image Quality

4.1 Resolution

Limit: (Pattern group visible cannot less than 2 groups from baseline)

Exposure Factor (kV / mAs)	Baseline Group No.	Comparison Group No.

Result: Pending

4.2 Contrast

Limit: (No. of visible disc cannot less than 2 groups of disc from baseline)

Parameter	Baseline Disc No.	Comparison Disc No.
High Contrast (0.5mm disc)
Low Contrast (11mm disc)

Result: Pending

5. Focal Spot Size Measurement

Limit: (Fperp or Fparallel ≤ 2.0 x Fnom)

Parameter	Value
Star pattern degree (θ)
Tube Focal Spot size Nominal (Fnom)
Maximum limit (2.0 x Fnom)
Star pattern diameter (mm)
Star pattern image diameter (mm)
Distance of blur perpendicular (mm)
Distance of blur parallel (mm)
Measured Fperp (mm)
Measured Fparallel (mm)

Result: Pending

6- Leakage Radiation

(Leakage Radiation ≤ 10mR in an hour)

Exposure Factor
kV
mA
mAs
sec

Leakage Technique Factor
kV
mA

Position	Anode	Front	Cathode	Back
Measured Readings (mR/hour)
RC
CF
True Readings (mR/hour)
Normalised Readings (mR in an hour)
Maximum Reading

Result: Pending

7- Scattered Radiation

(Scattered Radiation ≤ 10mR per week)

kV	mA	sec	mAs	Patient per week	Exposure per patient

Position
Measured Readings (µR/hour)
RC
CF
True Readings (mR/hour)
Weekly dose (mR per week)
Maximum Reading

Result: Pending

SUMMARY

No.	Parameter Tested	Pass/Fail
1.1	Repeatability of Radiation Output	Pending
1.2	Accuracy of kVp	Pending
1.3	Accuracy of Exposure Timer	Pending
1.4	Coefficient of Linearity	Pending
2.0	X-ray Beam Filtration (HVL measurement)	Pending
3.1	Collimation Light Field Illumination	Pending
3.2	X-ray Beam / Light Field Alignment	Pending
4.1	Image Quality - Resolution	Pending
4.2	Image Quality - Contrast	Pending
5.0	Focal Spot Size Measurement	Pending
6.0	Leakage Radiation	Pending
7.0	Scattered Radiation	Pending