You can be comfortable with radiology during your routine postings and still feel completely different when you sit across from an examiner.
A case comes on the screen. You know you have seen something similar before. But suddenly, you are not sure where to start.
Should you describe the lesion first? Give the diagnosis? Mention the differential? What if the examiner asks the next question and you get stuck?
This is quite common during the DNB Radiology practical exam.
The problem is usually not that residents have not studied. It is that practical exams require you to use your knowledge differently.
Here are 10 mistakes that can make the exam harder than it needs to be.
1. Looking at the image and guessing the diagnosis
You see a familiar-looking image and immediately think of a diagnosis.
That can work sometimes. But if the examiner asks, “What are the findings?”, you may realise you haven’t actually analysed the image.
Start with the basics.
Look at the modality, anatomy, location and abnormality. Then describe what you see.
A simple sequence can help:
Identify → Localise → Describe → Characterise → Diagnose
Don’t worry about sounding impressive. A clear answer is much better than a complicated one.
2. Forgetting the clinical history
This happens more often than you might think.
Residents become so focused on the image that they barely use the information given with it.
But a 25-year-old with a lesion and a 65-year-old with the same lesion are not necessarily approached in the same way.
Before starting, quickly ask:
- Who is the patient?
- What are the symptoms?
- Why was the scan done?
- Is there any relevant history of trauma, surgery or malignancy?
The history can often point you towards what you should actively look for.
3. Finding the lesion and stopping there
You spot the abnormality.
Great.
But don’t stop.
Examiners often want to know whether you can assess the whole case, not just identify one obvious finding.
If you see a lung mass, look at the rest of the lungs, mediastinum, pleura and relevant nodes.
If you see a renal lesion, don’t forget the other kidney, vessels, nodes and surrounding structures.
Make it a habit to ask yourself:
“What else should I check before I give my final answer?”
4. Knowing the answer but not knowing how to present it
This is a big one.
You may know exactly what the case is, but your answer comes out like:
“There is a lesion… it is hypodense… there is enhancement… it is probably…”
The examiner then starts asking one question after another.
The problem isn’t always your knowledge. Your presentation isn’t organised.
Practise presenting cases in the same order every time:
Modality → Site → Location → Findings → Characterisation → Extension → Associated findings → Impression
Once this becomes a habit, you won’t have to think about the order during the exam.
5. Giving five different diagnoses when one is clearly more likely
When the examiner asks for a differential, don’t turn it into a list of everything you remember from the textbook.
Give your most likely diagnosis first.
Then mention one or two sensible differentials and explain why they are worth considering.
For example:
“The most likely diagnosis is X because of these features. Y would be the main differential because…”
That is much stronger than simply naming six conditions.
6. Preparing only the images and ignoring the questions around them
Knowing the diagnosis is only the beginning.
The next question could be:
“What will you do next?”
Or:
“What is the best modality?”
Or:
“What are the complications?”
Or:
“How would you stage this?”
So when you revise a case, don’t stop at its name.
Try asking yourself:
What would the examiner ask me next?
This small change can make your revision much more useful.
7. Leaving spotters and classic cases for the last few days
Theory preparation and practical preparation are not the same thing.
You can read a topic several times and still take a few seconds to recognise the actual image.
For your DNB Radiology practical exam, regularly revise:
- Important X-rays
- CT and MRI cases
- Ultrasound cases
- Classic radiological signs
- Emergency cases
- Common differentials
- Important rare cases
- Procedures and interventions
And don’t just look at the answer.
Hide the diagnosis and try to describe the image yourself.
8. Practising only in your head
Reading a case and thinking, “Yes, I know this” is very different from saying the answer aloud.
During the practical, you have to speak.
So practise speaking too.
Take an image and give yourself a minute.
Describe it.
Give the diagnosis.
Mention the differential.
Then ask yourself what could come next.
You don’t need a huge mock-viva session every day. Even a short, regular practice session can help you become much more comfortable with answering aloud.
9. Panicking when you don’t recognise the case
At some point, you may get an image you’ve never seen before.
It happens.
Don’t let the first few seconds decide the rest of your viva.
If you don’t know the diagnosis, start with what you do know.
What modality is it?
What anatomy are you looking at?
Where exactly is the abnormality?
Is it solid or cystic? Hyperdense or hypodense? T1 or T2 bright? Enhancing or non-enhancing?
What structures are involved?
Sometimes, simply going back to your basic approach helps you work your way towards the answer.
And if you genuinely don’t know, don’t invent a diagnosis just to fill the silence.
10. Starting practical preparation too late
This is probably the mistake that causes the most unnecessary stress.
Many residents finish theory first and then think:
“Now I’ll start practical preparation.”
The problem is that practical skills need repetition.
You need time to see cases, discuss them, practise reporting and get comfortable with viva questions.
A useful habit during residency is to maintain your own DNB practical case list.
Whenever you come across an interesting case, add it.
Include:
- The diagnosis
- Key imaging findings
- Important differentials
- Common viva questions
- Any interesting clinical correlation
By the time your exam is close, you will already have a personalised revision list.
So, How Should a DNB Radiology Resident Prepare?
Don’t make your practical preparation another giant syllabus.
Focus on four things:
See the case
Get comfortable with images from different modalities.
Describe the case
Practise explaining what you see in a logical order.
Answer the viva
Think about the questions that naturally follow the case.
Think clinically
Know what the finding means for the patient and what could come next.
That is much closer to what you will actually need in the examination.
One Important Point for Radiology Residents
You cannot predict every case that will appear in your DNB practical exam.
And honestly, trying to memorise every possible image is not the best use of your time.
What you can prepare is your approach.
If the case is familiar, you should be able to recognise it quickly.
If the case is unfamiliar, you should still know where to start.
That difference matters.
Preparing for Your DNB Radiology Practical Exam?
This is where Conceptual Radiology can make your preparation more structured.
The focus should not be limited to remembering what a particular image looks like.
You need to understand why the findings are present, how to approach the image, what differentials to consider and how to discuss the case when the examiner starts asking questions.
For a Radiology resident, that kind of preparation is far more useful than simply collecting a long list of diagnoses.
Because on the day of your DNB practical, the examiner may show you a case you have never seen before.
You cannot prepare for every single image.
But you can prepare yourself to approach any image logically.
Final Takeaway
The DNB Radiology practical is not a test of how many images you can memorise.
It is about how well you can look, think, describe and communicate.
So while revising, don’t just ask:
“Do I know this case?”
Also ask:
“Can I describe it?”
“Can I give the differential?”
“Can I answer the next question?”
“Can I explain what I would do clinically?”
Start practising that during residency itself.
It will make the practical feel much less unfamiliar when you finally sit in front of the examiner.
