Postmortem Imaging – Virtopsy

The Digital Revolution in Forensic Autopsy Imagine a forensic pathologist receiving a body after a suspicious death. Traditionally, the body would undergo an external and internal examination, including dissection, organ examination, sampling and documentation. Now imagine that, before making an incision, investigators can place the body inside a CT or MRI scanner and create a detailed three-dimensional digital record of the entire body—including fractures, foreign objects, gas collections, vascular structures and many soft-tissue findings. This is the basic idea behind Virtopsy, or virtual autopsy.

Blog Nov 14, 2026 0 13 Add to Reading List

Virtopsy combines forensic medicine with postmortem CT, MRI, 3D surface scanning, image processing and sometimes angiography or image-guided sampling. The modern concept developed from the Virtopsy Project associated with the University of Bern in Switzerland in the late 1990s.

1. What is Virtopsy?

The word Virtopsy comes from:

Virtual + Autopsy = Virtopsy

It refers to the use of advanced imaging and computer-based techniques to examine a deceased person without relying solely on conventional dissection.

The central technologies include:

Postmortem Computed Tomography (PMCT)
Postmortem Magnetic Resonance Imaging (PMMRI)
Postmortem CT Angiography (PMCTA)
3D surface scanning
Photogrammetry
Magnetic Resonance Spectroscopy (MRS)
3D image reconstruction
Image-guided biopsy/sampling

Recent reviews describe PMCT as a major component of modern forensic imaging, while MRI provides complementary information, particularly for soft tissues and the central nervous system.

2. Why was Virtopsy developed?

Surprising Medical Breakthrough In Cause Of Death Examination — Daniel Ochu

Traditional autopsy remains extremely important, but it has some limitations.

A conventional autopsy:

is invasive
changes the condition of the body
involves human interpretation
can make later reassessment difficult
may be unacceptable or problematic in some cultural or religious contexts
cannot always preserve every finding in a readily reviewable 3D format

Virtopsy attempts to address some of these problems by creating a digital record of the body before destructive examination.

One major advantage is that the digital dataset can be stored and re-examined later by another forensic expert.

3. How does a Virtopsy investigation work?

A simplified workflow is:

Deceased body

⬇️

External documentation

⬇️

3D surface scanning

⬇️

Postmortem CT

⬇️

Postmortem MRI, if required

⬇️

Special imaging / angiography

⬇️

3D reconstruction

⬇️

Forensic interpretation

⬇️

Comparison with conventional autopsy, toxicology, histology and other evidence

⬇️

Final forensic opinion

4. Postmortem CT – The backbone of Virtopsy

Computed Tomography (CT) uses X-rays to create cross-sectional images of the body.

In postmortem CT, the deceased person is scanned after death.

The scanner produces a large number of thin slices that can be reconstructed into different views.

For example, the examiner can examine:

Axial view

A cross-section through the body.

Coronal view

A front-to-back oriented reconstruction.

Sagittal view

A side-oriented reconstruction.

3D reconstruction

A three-dimensional representation of anatomical structures.

Modern PMCT protocols can use high-resolution acquisitions and multiple reconstructions because radiation exposure to a deceased person is not a concern in the same way as it is for living patients.

5. What can CT detect?

CT is particularly valuable for bones and high-density materials.

It can help identify:

skull fractures
facial fractures
rib fractures
spinal injuries
pelvic fractures
foreign bodies
bullets and fragments
dental structures
gas collections
some internal injuries
skeletal trauma
fracture patterns

This makes PMCT especially useful in trauma, firearm and unidentified-body investigations. A recent scoping review identified PMCT as particularly effective for complex osseous injuries, bullet trajectories and some characteristic findings in drowning cases.

6. Virtopsy in firearm injuries

Gerichtsmediziner Dr. Robot (Schunk) in Greifer - Automation.at

This is one of the most impressive applications.

Suppose a body has a suspected gunshot injury.

Traditional examination may require careful dissection to determine:

bullet path
entry wound
exit wound
internal fractures
bullet fragments
projectile location

PMCT can provide a three-dimensional view of the projectile and associated skeletal damage.

For example:

Entry region

⬇️

Bone damage

⬇️

Projectile trajectory

⬇️

Bullet/fragments

The 3D dataset can then be manipulated to examine the trajectory from different perspectives.

However, imaging is interpreted together with the external examination, scene findings, autopsy and other evidence—it does not independently establish every aspect of a shooting event.

7. Postmortem MRI

While CT is excellent for bones and many traumatic findings, MRI is particularly useful for soft tissues.

MRI can provide detailed information about:

brain
spinal cord
muscles
organs
soft-tissue injuries
hemorrhage
some cardiac structures
neurological abnormalities

Research comparing modalities has found PMMRI particularly valuable for soft-tissue and neurological assessment

8. CT vs MRI in Virtopsy

Feature	Postmortem CT	Postmortem MRI
Bone	⭐⭐⭐⭐⭐	⭐⭐
Fractures	Excellent	Good
Bullet/metal detection	Excellent	Limited/affected by artefacts
Brain	Good	Excellent
Soft tissue	Good	Excellent
3D bone reconstruction	Excellent	Less suitable
Vascular imaging	With special PMCTA	Possible with appropriate techniques
Speed	Relatively fast	Usually slower
Whole-body trauma	Excellent	Useful complement

9. Postmortem CT Angiography – PMCTA

One limitation of ordinary CT is that the body's blood circulation has stopped.

Therefore, conventional clinical CT angiography cannot simply be transferred unchanged to a deceased body.

Postmortem CT angiography (PMCTA) uses specialized techniques to introduce a contrast agent into the vascular system.

This can help visualize:

arteries
veins
vascular injuries
vessel abnormalities
some sources of bleeding

Research reviews identify PMCTA as particularly useful for investigating vascular lesions and certain natural-death cases.

10. 3D Surface Scanning

Virtopsy is not only about looking inside the body.

The external surface can also be digitally captured.

3D surface scanning can document:

wounds
bruises
abrasions
lacerations
burns
patterned injuries
body morphology
facial features

A digital 3D model can preserve the external appearance for later examination.

The original Virtopsy approach integrated CT/MRI with 3D surface documentation.

11. Photogrammetry

Another technique is photogrammetry.

Multiple photographs are taken from different angles.

Specialized software then uses these images to construct a three-dimensional representation.

For example:

???? Photograph 1
???? Photograph 2
???? Photograph 3
???? Photograph 4

↓

???? Photogrammetry processing

↓

???? 3D surface model

This can be particularly useful when documenting external injuries or the overall appearance of remains.

The two techniques are therefore complementary rather than competitors.

FRANCE-SCIENCES-JUSTICE-INQUIERY

12. 3D Reconstruction

This is where Virtopsy becomes especially powerful.

Instead of looking at hundreds or thousands of individual CT slices, the examiner can create a 3D reconstruction.

For example, a skull can be digitally reconstructed and rotated.

The examiner may then examine:

fracture lines
bone displacement
foreign bodies
dental structures
anatomical relationships

13. Virtopsy and identification of unknown bodies

Imagine investigators recover an unidentified body.

Traditional identification methods may include:

fingerprints
dental comparison
DNA
anthropological examination

Postmortem imaging can provide additional information.

CT can document:

dental structures
previous fractures
surgical implants
prostheses
anatomical abnormalities
healed injuries

These findings may then be compared with ante-mortem medical or dental records.

Forensic imaging has long been used in identification, including dental comparisons and reconciliation of ante-mortem and postmortem imaging.

14. Virtopsy in forensic odontology

Dental structures are particularly resistant to decomposition and can be highly valuable for identification.

CT can document:

teeth
roots
jaw structures
restorations
implants
dental morphology

A 3D reconstruction may help a forensic odontologist examine the dental structures without immediately performing extensive physical intervention.

This can be especially useful when dealing with severely damaged or decomposed remains.

15. Virtopsy in trauma investigation

Suppose a person dies after a fall.

The body may have:

skull fractures
rib fractures
vertebral injuries
pelvic fractures
internal bleeding
soft-tissue trauma

PMCT can rapidly provide a whole-body overview.

The examiner can then focus on areas requiring more detailed investigation.

This is one reason postmortem imaging can work as an early investigative map before or alongside conventional autopsy.

16. Virtopsy and drowning investigations

Drowning is a particularly challenging forensic diagnosis because there is often no single finding that independently proves drowning.

Postmortem imaging can provide useful information, including certain patterns involving:

lungs
airways
fluid/gas distribution
sinuses
skeletal injuries
associated trauma

Recent reviews identify PMCT as useful for detecting characteristic findings in some drowning investigations, but imaging findings must be interpreted within the entire case context.

This is an important principle:

Virtopsy supports forensic diagnosis; it does not turn a complex diagnosis into a simple one.

17. Virtopsy and decomposition

Postmortem imaging can also document the body when decomposition has begun.

CT can provide information about:

skeletal structures
gas distribution
foreign objects
remaining anatomical structures

However, decomposition itself creates imaging changes that can sometimes complicate interpretation.

Therefore, the examiner needs specific knowledge of postmortem changes.

18. Virtopsy and time since death

There has been research into using imaging and advanced techniques to estimate the postmortem interval (PMI).

Potential approaches include:

decomposition-related imaging changes
MRI
magnetic resonance spectroscopy
biochemical analysis
temperature measurements
computational models

Magnetic resonance spectroscopy has been investigated for biochemical changes occurring after death, but PMI estimation remains complex and should not be presented as a simple "CT tells the exact time of death" technique.

19. Magnetic Resonance Spectroscopy — MRS

MRS goes one step further than conventional MRI.

Instead of primarily creating anatomical images, it can provide information about chemical metabolites in tissues.

In forensic research, MRS has been investigated for studying postmortem biochemical changes and their potential relationship with postmortem interval.

This remains more specialized and research-oriented than routine PMCT.

20. Micro-CT

For very small structures, micro-computed tomography (micro-CT) can provide extremely high-resolution imaging.

It can be useful for:

small bones
teeth
bullets
tissue samples
anatomical structures
archaeological/anthropological specimens

Earlier Virtopsy research described micro-CT systems capable of imaging small samples at very high resolution.

21. Virtopsy in child and fetal death investigations

Postmortem MRI has become particularly important in some fetal, neonatal and pediatric investigations.

Why?

Because very detailed soft-tissue information can sometimes be obtained without extensive dissection.

This can be valuable when parents have concerns about invasive examination.

Current reviews identify pediatric and fetal investigations as areas where postmortem MRI has particular relevance

Frontiers | VIRTual autOPSY—applying CT and MRI for modern forensic death investigations

Virtopsy and conventional autopsy

Conventional Autopsy	Virtopsy
Physical examination	Digital examination
Invasive	Non-invasive/minimally invasive imaging
Direct tissue examination	Imaging-based examination
Histology possible directly	Requires sampling for histology
Toxicology sampling possible	Can guide targeted sampling
Strong for many pathological findings	Strong for 3D anatomy and trauma documentation
Can alter the body	Preserves digital record before intervention
Human interpretation	Digital, reproducible datasets
Re-examination may be limited	Dataset can be reviewed repeatedly

But Virtopsy should not automatically be considered a complete replacement for conventional autopsy.

Some diseases, toxicological conditions and microscopic findings cannot be adequately established from imaging alone.

Virtopsy and courtroom presentation

3D reconstructions can also help explain complicated injuries.

Instead of showing a court dozens of CT slices, an expert may use:

axial images
sagittal images
coronal images
3D bone reconstructions
vascular reconstructions
annotated models

For example, a complex skull fracture can be much easier to understand through a rotating 3D model.

However, the original imaging data and reconstruction methodology must remain available, and the presentation should clearly distinguish observed findings from interpretations.