Unit 1392: Advanced Medical Imaging Modalities

1. Introduction to Advanced Imaging Modalities

• Overview of advanced imaging techniques
• Importance in medical diagnosis
• Brief introduction to MRI, CT, PET, Ultrasound
• Comparison of modalities: strengths, limitations, and clinical scenarios

2. Magnetic Resonance Imaging (MRI)

2.1 Physics of MRI

• Nuclear magnetic resonance principles
• Magnetic fields and radiofrequency pulses
• T1, T2 relaxation times

2.2 Image Acquisition Techniques

• Pulse sequences (spin echo, gradient echo)
• Functional MRI (fMRI) basics
• Diffusion-weighted imaging

2.3 Clinical Applications

• Neurology: brain tumor imaging, stroke
• Musculoskeletal imaging
• Cardiovascular MRI

3. Computed Tomography (CT) Imaging

3.1 Principles of CT Imaging

• X-ray generation and detection
• Image acquisition geometry

3.2 Image Reconstruction Methods

• Filtered back projection
• Iterative reconstruction techniques

3.3 Contrast Agents

• Types and mechanisms
• Usage protocols and safety

3.4 Clinical Applications

• Tumor detection
• Fracture identification
• Vascular disease imaging

4. Positron Emission Tomography (PET) Imaging

4.1 Radiotracers

• Common radiotracers (e.g., FDG)
• Radiotracer production and properties

4.2 Image Reconstruction Algorithms

• Analytical vs iterative methods
• Correction techniques (attenuation, scatter)

4.3 Clinical Indications

• Oncology
• Cardiology
• Neurology

4.4 PET/CT and PET/MRI Integration

• Hybrid imaging advantages
• Workflow and interpretation

5. Ultrasound Imaging

5.1 Ultrasound Technology

• Transducer types and frequencies
• Image formation and modes (B-mode, M-mode)

5.2 Doppler Ultrasound

• Principles of Doppler effect
• Blood flow assessment

5.3 Clinical Applications

• Obstetrics and gynecology
• Cardiology
• Musculoskeletal imaging

6. Nuclear Medicine Imaging

6.1 Techniques Overview

• Single Photon Emission Computed Tomography (SPECT)
• Positron Emission Tomography (PET) review

6.2 Radiopharmaceuticals

• Types and targeting mechanisms
• Production and handling

6.3 Radiation Safety

• Principles of radiation protection
• Patient and operator safety measures

6.4 Clinical Roles

• Oncology imaging
• Cardiology assessments
• Neurological applications

7. Advanced Imaging in Neuroimaging

7.1 Functional MRI (fMRI)

• Blood oxygen level dependent (BOLD) imaging
• Brain activation mapping

7.2 Diffusion Tensor Imaging (DTI)

• White matter tractography
• Measurement of anisotropy

7.3 Functional Connectivity

• Resting state networks
• Applications in neurological disorders

8. Image Processing and Analysis in Advanced Imaging

8.1 Image Reconstruction Techniques

• Enhancing image quality
• Noise reduction

8.2 Image Enhancement and Segmentation

• Contrast adjustment
• Edge detection and region growing

8.3 Quantitative Analysis

• Volumetric measurements
• Functional data quantification

8.4 Software Tools and Applications

• Common platforms (e.g., MATLAB, OsiriX)
• Integration in clinical and research workflows