CT Phantom Testing | Complete Quality Assurance (QA) Procedure for CT Scanner | By Anis Qureshi скачать в хорошем качестве

CT Phantom Testing | Complete Quality Assurance (QA) Procedure for CT Scanner | By Anis Qureshi

In this tutorial, Anis Qureshi demonstrates how to perform phantom testing in a CT scanner — a vital quality assurance process to ensure accurate and safe imaging. 📌 Step-by-Step Procedure: 1️⃣ Purpose of Phantom Testing: To check CT image quality, calibration, and performance. Ensure scanner meets safety & diagnostic standards. Detect early technical issues before patient scans. 2️⃣ Types of CT Phantoms: Water Phantom: For CT number accuracy, noise, uniformity. ACR Phantom: For CT number, noise, uniformity, resolution, slice thickness. Anthropomorphic Phantom: For dose and anatomical simulation. 3️⃣ Preparation: Turn on CT scanner & let it warm up (as per manufacturer guidelines). Select appropriate phantom for test. Place phantom on table centered to gantry isocenter. Remove all unnecessary objects from scan field. 4️⃣ Positioning: Align phantom with laser lights in all three planes. For ACR phantom: Align central slice marker with scanner’s positioning light. Ensure table height matches isocenter. 5️⃣ Scanning Parameters: kVp: 120 (or per manufacturer QA protocol) mAs: 100–200 (as per test requirements) Slice thickness: 1–5 mm (depending on test type) Use standard head or body protocol depending on phantom type. 6️⃣ Scanning Process: Do an NCCT scan of the phantom. Save raw data and reconstructed images. Reconstruct axial slices at required thickness. 7️⃣ Measurements & QA Checks: CT Number Accuracy: Measure HU in water section (should be ~0 HU ± 5). Uniformity: Compare HU values in center vs periphery. Noise: Standard deviation of HU in uniform region. Slice Thickness: Check using ramp or wedge section. Low Contrast Resolution: Identify smallest visible low-contrast object. High Contrast Resolution: Identify smallest visible high-contrast lines/spaces. 8️⃣ Recording & Documentation: Enter all measurements into QA logbook. Compare with manufacturer & ACR tolerance limits. If results are out of range → inform service engineer immediately. 🔍 Why This Test Is Important: Ensures accurate HU measurements. Confirms image quality for diagnosis. Reduces patient dose errors. Maintains compliance with ACR, AERB, or local QA regulations. 🎯 Who Should Watch: Perfect for Radiology students, X-ray/CT Technicians, Medical Physicists, SSB aspirants, and QA professionals. 📌 Follow for more radiology tutorials: Instagram: @anisqureshi0 🔖 Hashtags: #CTScan#CTPhantom #CTQA #CTQualityAssurance #CTTesting #CTPhantomTest #Radiology #Radiographer #CTPositioning #HU #CTNoise #CTUniformity #CTResolution #RadiologyTutorial #AnisQureshi #JKSSB #CTMaintenance #ACRPhantom #MedicalPhysics #CTSliceThickness #CTNumberAccuracy Anatomy of X-ray/ Radiographs    • X-ray Anatomy of Radiographs.   MRI Basics.    • MRI Basics   Ultrasound Basics.    • Ultrasound   CT Scan procedures,👇👇👇    • CT scan Procedures   #radiology radiology #xray #radiologia #medicine #radiologist #medical #mri #radtech #xraytech #radiographer #doctor #healthcare #radiologytech #imaging #xrays #radiologylife #radiologystudent #ct #ctscan #medicalimaging #ultrasound #hospital #surgery #nurse #medstudent #xraystudent #covid #medicina #medicalstudent #pathology