Summary of Medical Terminology: Diagnostics and Blood Tests
Medical Terminology: Diagnostics and Blood Tests Explained
Introduction
Diagnostic Imaging and Blood Tests are essential tools for diagnosing, monitoring, and guiding treatment of many conditions. This material summarizes common imaging modalities, key blood-test terms, and practical applications so you can learn independently and use concepts confidently in clinical contexts.
Definition: Diagnostic imaging refers to techniques that create visual representations of the interior of the body. Blood tests analyze components of blood to provide information about physiology, infection, and disease.
1. Overview of Imaging Modalities
Break imaging into modality, main use, and a practical tip.
X-ray and CT
- X-ray: quick images of bone and air-containing structures.
- Computed Tomography (CT): cross-sectional imaging that gives detailed anatomy and density differences.
Definition: Computed tomography (CT) is a radiologic method producing cross-sectional images of the body using X-rays and computer reconstruction.
Table: X-ray vs CT
| Feature | X-ray | CT |
|---|---|---|
| Typical use | Bone fractures, chest radiographs | Detailed chest/abdomen imaging, trauma assessment |
| Image type | 2D projection | Cross-sectional slices |
| Radiation | Lower | Higher |
| Practical tip | Fast and cheap | Use when more detail is needed |
Ultrasound
- Uses high-frequency sound waves; excellent for soft tissues, fluid, and real-time guidance.
Definition: Ultrasound is an imaging method using high-frequency sound waves to create images of structures inside the body.
Practical examples:
- Obstetric scans for fetal growth
- Vascular studies of blood flow
- Guiding needle placement for biopsies
Endoscopy
- Visual inspection of internal cavities using a flexible camera; useful for direct visualization and minor interventions.
Definition: Endoscopy is a procedure that uses a flexible scope to view the interior of hollow organs and, if needed, introduce instruments.
Example: Insert through the mouth to visualize the upper gastrointestinal tract.
2. Common Imaging Terms and Concepts
Planes and sections
- Coronal (frontal): divides front and back
- Frontal: synonymous with coronal in many contexts
- Cross-sectional: slice perpendicular to long axis
Table: Planes and when to use them
| Plane | Description | Typical use |
|---|---|---|
| Coronal | Anterior–posterior division | Viewing chest or brain surface relationships |
| Frontal | Same as coronal | Anatomical orientation |
| Cross-sectional | Transverse slices | CT and MRI slice review |
Contrast and radiation
- Contrast medium: agent introduced to enhance visibility of structures.
- Ionizing radiation: used in X-rays and CT; minimizes exposure when possible.
Definition: Contrast medium is a substance introduced into the body to improve the contrast of structures or fluids in medical imaging.
Practical note: Iodine-based contrasts are common for CT; always check for contraindications.
3. Procedures Often Associated with Imaging
- Biopsy: sampling tissue, e.g. fine needle biopsy or bone marrow biopsy, often image-guided.
- Endoscopy: visual inspection and sampling via scope.
- Cauterize: stop bleeding by thermal methods after biopsies or minor procedures.
Definition: Biopsy is the removal of tissue for microscopic examination to establish a diagnosis.
Real-world application: A suspicious breast lump may undergo ultrasound-guided fine needle biopsy for cytology.
4. Key Blood Test Vocabulary
- Complete blood count (CBC / FBC): evaluates red cells, white cells, and platelets.
- Basic metabolic panel (BMP): tests electrolytes and metabolic markers.
- Erythrocytes (red blood cells): carry oxygen.
- Leukocytes (white blood cells): key cells of the immune system.
- Clot / blood clot:
Zaregistruj se pro celé shrnutíAlready have an account? Sign in
Diagnostic Imaging & Blood
Klíčová slova: Diagnostic Imaging and Blood Tests, Diagnostic Procedures and Blood Sampling, Diagnostic Methods and Blood
Klíčové pojmy: CT produces cross-sectional slices for detailed anatomy, Ultrasound uses high-frequency sound waves for real-time imaging, Contrast media improve visibility; check contraindications before use, CBC (or FBC) evaluates red cells, white cells, and platelets, BMP assesses electrolytes and metabolic status, Biopsy types include fine needle and bone marrow biopsies, Keep still during imaging to ensure high-quality images, Use appropriate dressing and sterile technique after procedures, Coronal/frontal and cross-sectional planes help orient images, Minimize ionizing radiation and tailor protocols to patient size, Endoscopy allows direct visualization and instrument introduction, Always obtain informed consent and review contraindications