CT SCAN OF HRCT
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Certified Labs
NABH Accredited
Reports in
6hrs
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About The Test
The CT scan of HRCT—short for High-Resolution Computed Tomography—is a specialised imaging test that captures razor-sharp images of very small structures inside the body. It is especially useful for examining the lungs, but also helps doctors study the temporal bone and other fine anatomical areas. Cadabams Diagnostics offers the latest HRCT technology, ensuring accurate results with minimal discomfort.
What is HRCT High-Resolution Computed Tomography Scan?
An HRCT High-Resolution Computed Tomography Scan uses thin-slice X-ray beams and advanced computer processing to create detailed cross-sectional pictures. Compared to a regular CT, the “high-resolution” mode uses:
- 1 mm or thinner slice thickness
- High-spatial-frequency reconstruction algorithms
- Targeted imaging of specific organs
This level of detail makes subtle lung scarring, tiny bone fractures, or early infections visible—often before symptoms appear.
When and Who Needs to Take a HRCT High-Resolution Computed Tomography Scan?
Doctors most often recommend an HRCT scan for patients who:
- Have persistent cough, shortness of breath, or unexplained chest pain
- Are at risk of interstitial lung disease or lung fibrosis
- Need to rule out COVID-19 pneumonia complications
- Suffer from chronic sinusitis or hearing loss (temporal bone imaging)
- Require follow-up after abnormal chest X-rays
If you fall into any of these groups, ask your physician whether a CT scan of HRCT is the next logical step.
List of Parameters
- Slice thickness (0.5–1 mm)
- Kilovoltage (kV) and milliamperage (mA) settings
- Reconstruction interval
- Breath-hold duration
- Contrast timing (if used)
Why This Test
- Evaluate unexplained dyspnoea
- Monitor progression of interstitial lung disease
- Detect early pulmonary fibrosis
- Assess occupational lung disorders (e.g., silicosis)
- Plan or guide lung biopsy procedures
When to Take Test
Benefits
Benefits of Taking the Test
- Early detection of serious disease
- Non-invasive compared to surgical biopsy
- Quick appointment slots—often same-day at Cadabams Diagnostics
- Digital reports delivered within 24 hours
- Reduced repeat scans thanks to high clarity
Illnesses Diagnosed with HRCT Scan
- Idiopathic pulmonary fibrosis
- Sarcoidosis
- COVID-19 pneumonia sequelae
- Bronchiectasis
- Temporal bone fractures
- Chronic otitis media complications
Preparing for test
Pre-requisites
- Valid doctor’s prescription
- Recent serum creatinine report if contrast is used
- Signed consent form acknowledging radiation exposure
- Insurance pre-authorisation (if applicable)
Best Time to Take the HRCT High-Resolution Computed Tomography Scan
- Morning slots reduce waiting times
- Schedule after initial treatment for baseline imaging
- For follow-up scans, maintain the same time of day for consistency
Eligibility
- Adults and children (age 5+ able to hold breath)
- Pregnant women—only if benefits outweigh risks and with lead shielding
- Patients with implanted devices—most are HRCT-compatible
Procedure for Taking a HRCT High-Resolution Computed Tomography Scan
- Check-in at Cadabams Diagnostics reception.
- Change into gown if needed; store valuables in locker.
- Lie on the table; the technician positions you.
- Hold your breath for 5–10 seconds while the gantry rotates.
- Contrast dye (if ordered) is injected via IV halfway through.
- Total scan time: 10–15 minutes.
- Dress up and collect your appointment slip for report collection.
Caution Before Taking the Test
- Allergies: Inform staff about shellfish, iodine, or prior contrast reactions.
- Diabetes: Hold metformin on the day of contrast scan.
- Claustrophobia: Ask for mild sedation available on request.
- Children: A parent can stay in the room wearing a lead apron.
Test Results
Results and Interpretations
| Finding / Observation | Description | General Interpretation / Significance |
|---|---|---|
| Normal scan | No abnormalities detected in lung tissue or bone structures. | Indicates healthy status; no further action needed. |
| Ground-glass opacities | Hazy areas visible in lungs but not obscuring underlying vessels. | Suggests inflammation, infection, or early fibrosis; may need monitoring or treatment. |
| Honeycombing pattern | Small cystic spaces in lung tissue, often at the bases. | Strongly suggests advanced fibrosis (e.g., idiopathic pulmonary fibrosis). |
| Nodules or masses | Rounded, well-defined densities in the lung or other structures. | May be benign or require biopsy to rule out malignancy. |
Risks & Limitations
While generally safe, the test involves:
- Radiation exposure—roughly equal to six months of natural background radiation
- Contrast dye risks—possible allergic reaction or kidney strain in susceptible patients
- Limitation in motion—blurred images if the patient cannot hold their breath
- Not ideal for obese patients—image quality may drop in very high body-mass index ranges
Cadabams Diagnostics uses dose-reduction protocols and follows strict safety guidelines to keep risks minimal.
Types of HRCT High-Resolution Computed Tomography Scan
Thoracic HRCT
Focuses on lungs and airways. Detects emphysema, bronchiectasis, or lung nodules.
Temporal Bone HRCT
Examines the ear structures to diagnose cholesteatoma, ossicular chain disruption, or superior canal dehiscence.
High-Resolution CT Patterns
Radiologists look for specific textures—ground-glass opacities, honeycombing, or tree-in-bud patterns—to classify disease type and stage.
List of Parameters Considered During the HRCT High-Resolution Computed Tomography Scan
Technicians monitor:
- Slice thickness (0.5–1 mm)
- Kilovoltage (kV) and milliamperage (mA) settings
- Reconstruction interval
- Breath-hold duration
- Contrast timing (if used)
FAQs
Is HRCT the same as a regular chest CT?
No. HRCT uses thinner slices and higher resolution to detect tiny lung changes a standard CT might miss.
How much radiation will I receive?
The effective dose is about 1.5 mSv—similar to 6 months of natural background exposure.
Can I eat before the scan?
Yes, unless your doctor orders contrast dye; then fast for 2–4 hours.
Do I need a referral?
Yes. A registered physician’s prescription is mandatory.
How long does it take to get the results?
A radiologist must meticulously review the large number of detailed images. Your referring doctor will typically receive the comprehensive report within 24-48 hours. They will then schedule a follow-up to discuss the findings with you.
What are the next steps after an HRCT scan?
After the scan, your doctor will discuss the radiologist's report with you. Based on the findings, they will explain what it means for your health, confirm a diagnosis, and outline the next steps, which could include starting a treatment plan or recommending further tests.