What Is a USG Scan, and When Is It Needed?

Question

I recently heard my doctor mention a USG scan, and I don’t fully understand what it is used for. Now I’m wondering—what exactly is a USG scan, and when is it needed?

From what I understand, USG (ultrasound) scan is a medical imaging technique that uses sound waves to create images of organs and tissues. But what conditions does it help diagnose—does it only check pregnancy, or is it also used for liver, kidney, and heart problems?

I also read that USG scans are safe since they don’t involve radiation like X-rays or CT scans. But are there any risks or limitations? How should someone prepare for a USG scan, and does it require fasting in some cases?

Since I prefer natural approaches to health, I looked into Ayurveda’s perspective on diagnostic methods. Are there Ayurvedic practices or pulse diagnosis techniques that can assess health without imaging tests like a USG scan? I found that Nadi Pariksha (pulse reading) is commonly used—does it provide accurate health assessments similar to modern scans?

For those who have had a USG scan, what was your experience like? What conditions did it help diagnose, and did it lead to effective treatment? I’d love to hear real insights on when a USG scan is necessary and useful.

Dr Sujal Patil · Accepted Answer

A USG (ultrasound) scan is a non-invasive imaging technique that uses high-frequency sound waves to create images of internal organs, tissues, and blood flow. While it is widely known for monitoring pregnancy, it is also used to diagnose conditions related to the liver, kidneys, gallbladder, heart, thyroid, and reproductive organs. It helps detect tumors, cysts, infections, and organ abnormalities and is also used in Doppler studies to assess blood circulation.

One of the biggest advantages of a USG scan is its safety, as it does not use radiation like X-rays or CT scans. However, it has some limitations—for example, it may not provide clear images in cases of excess gas or deep organ issues. Preparation depends on the type of scan; for an abdominal ultrasound, fasting for 6–8 hours is often required, while a pelvic ultrasound may need a full bladder for better imaging. Always follow the specific instructions given by the doctor for accurate results.

In Ayurveda, Nadi Pariksha (pulse diagnosis) is a traditional method used to assess organ function, dosha imbalances, and overall health without imaging. While it does not provide anatomical images like a USG scan, experienced Ayurvedic practitioners can detect early signs of disease and recommend preventive treatments. Both modern and traditional diagnostic methods have their place, and combining them can offer a comprehensive approach to health.

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