Questions to Ask a Radiology Expert Witness at Deposition (2026 Guide)

By John Mahoney · Updated 2026-09-01 · 18 questions in 4 concession chains

You are about to cross-examine someone with two decades of training you don't have, on their home turf, about the thing they do every day. That asymmetry is the defining problem of medical-expert depositions — and it gets worse in multi-defendant malpractice cases, where two to four different specialties can be in play in a single case and you have to be conversant in all of them by deposition day.

Radiology experts testify in missed-finding cases and failure-to-communicate cases. The defense will be perceptual — errors of perception happen to careful radiologists. The funnel’s job is to separate perception from interpretation from communication, because they are defended very differently.

The answer to the asymmetry is not to learn radiology — it is structure. A concession funnel asks the expert to agree, one fact at a time, to propositions so orthodox that refusing them costs more credibility than granting them. The questions below are a generic-case-safe starting bank, organized into the four chains that structure works through.

How to use these questions

Every question below follows three rules of expert cross-examination: it is leading (it states a fact and asks for agreement), it contains one fact (no compounds — a compound question lets the witness answer the easy half), and it belongs to a concession chain (each answer narrows the room the next answer can live in). Ask them in order. When you get the concession, stop — do not ask the "why" question that lets the expert explain it away.

Chain 1 — Qualifications, retention & scope

Goal: establish on the record that this is a paid, retained witness who never touched the patient, and fix the boundaries of what they actually practice.

Doctor, you were retained by opposing counsel in this case, correct?
You are being compensated for your time reviewing this case and for your testimony today, correct?
You never examined or treated the patient in this case, correct?
Everything you know about this case comes from the materials counsel selected and sent to you, correct?
You reviewed the same images that were available to the radiologist at the time, correct?

Chain 2 — Bases-of-opinion lockdown

Goal: freeze the universe. After this chain, any new document, new basis, or new opinion at trial is impeachment material.

You have now told us every document and material you reviewed in forming your opinions, correct?
You are not relying on anything outside that file for the opinions you will give in this case, correct?
You have told us every opinion you intend to offer at trial, correct?
You agree that an opinion you cannot state to a reasonable degree of medical probability is speculation, correct?

Chain 3 — Substantive concessions: perception, interpretation, and communication

Radiology malpractice has three distinct failure points, and experts win when they are allowed to blur them. This chain forces the distinctions onto the record.

Radiologists are the physicians specifically trained to identify findings on imaging, correct?
Whether a finding is present on an image and whether it was perceived are two different questions, correct?
Whether a finding was perceived and how it was interpreted are also two different questions, correct?
A critical finding must be communicated to the treating team, correct?
The written report is the radiologist’s communication of record — it says what it says, correct?
The clinical history provided with a study helps direct the radiologist’s attention, correct?

Chain 4 — Closing the doors

Goal: end with the record sealed. These questions convert silence into a commitment that nothing new is coming at trial.

You are not offering any opinions in this case beyond the ones we have discussed today, correct?
You have not held back any opinion or criticism that you intend to offer at trial, correct?
You are not offering any opinion about what the treating physicians should have done with the report, correct?

These are the generic questions. Your case isn't generic.

The MedLegal AI Examination Builder generates a complete, case-specific concession-funnel roadmap for deposing a radiology expert — built from your theory of the case, aware of which side you're on and what kind of witness you're facing, with stop markers, if-they-resist branches, and the doors you should not open. Three free cases, no credit card.

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Where lawyers get burned deposing radiology experts

Fighting the hindsight framing on its own terms

The defense will say every missed finding is obvious in retrospect. Do not argue that it was obvious prospectively. Lock the sequence: the finding is on the film, the film was the radiologist’s to read, and perception versus presence are different questions. Let the jury hold the film.

Letting a communication failure become a perception debate

If the finding was seen and reported but never reached the treating team, the case is about communication — a systems and duty question — not perception. Experts steer toward perception because it is more forgiving. Keep the chains separate and do not let the easier defense absorb the harder one.

Not locking which images and series the expert reviewed

Imaging studies have multiple series, windows, and priors. An expert who has not committed to exactly what they reviewed can later claim the critical view was different. Inventory their review — study by study, series by series — before any substantive question.

FAQ

What questions should I ask a radiology expert witness at deposition?

Work in four concession chains: (1) qualifications, retention, and scope — establish the expert was retained, is compensated, never treated the patient, and what they do and do not practice; (2) bases-of-opinion lockdown — pin every document reviewed and every opinion they intend to offer; (3) the radiology-specific substantive chain — well-established propositions such as "Radiologists are the physicians specifically trained to identify findings on imaging"; and (4) closing the doors — confirm on the record that no undisclosed opinions remain. Every question should be leading, contain one fact, and build on the prior answer.

How do I cross-examine a medical expert when I never went to medical school?

You don't out-doctor the doctor — you build concession chains from propositions so well-established that a credible radiology expert cannot refuse them, then apply those concessions to the facts in the chart. The expert's medical training becomes your asset: the more orthodox the proposition, the more it costs them to fight it. The asymmetry problem is real — especially in multi-defendant cases with two to four specialties — which is why the questions are organized as funnels rather than as debates.

What are the biggest traps when deposing a radiology expert witness?

The classic traps are arguing prospective obviousness against the hindsight defense instead of separating presence from perception, letting a failure-to-communicate case get re-framed as a more forgiving perception case, and failing to inventory exactly which images and series the expert reviewed.

Related resources

Examination Builder — a case-specific concession-funnel roadmap from your theory of the case
Radiology deposition trainer — the other side of the table: how radiology witnesses are prepped against these questions
All specialties — deposition question guides
Are you a radiology physician? Join the MedLegal AI expert network

This page is informational only and is not legal advice. Question banks are generic-case-safe starting points — adapt every question to the facts, the jurisdiction, and your theory of the case before using it in a deposition.