Using ChatGPT to assess CT scans of the brain

It’s interesting how if I ask ChatGPT about the scans, it basically tells me the same thing the doctor told me and maybe a little bit more. It did help that I told ChatGPT about my mother’s stroke, and how she had some flexor on her left side, including her left leg and left arm.

Flexor is a condition in which perhaps the motor function is not working right and the result is some muscles get really tight. In my mother’s case, she grips really hard with her left hand to the point where it will even cause bleeding in her palm if the fingernails are not kept trimmed. And her left hamstring is really tight and she cannot straighten her left leg. Often times her foot will be bent back behind her butt.

Here is the information I received about the scans

If the diagnosis indicated there had been bleeding in the brain (intracranial hemorrhage) and it has since subsided, here’s what that means and how it correlates with what you see in the CT scans:

1. Acute Bleeding in the Brain:

• In the earlier image (with more white area), the bright white region represents acute or recent bleeding (hyperdense blood). This occurs because blood is denser than brain tissue and cerebrospinal fluid, so it appears white on a CT scan.

• The location and size of this white area help the radiologist determine where the bleed occurred (e.g., within the brain tissue—intracerebral, or in spaces like the subdural, subarachnoid, or epidural areas).

2. Resolving or Resolved Hemorrhage:

• In the later scan (with less white area), the decrease in brightness means the bleed has resolved or is resolving. Over time, the body reabsorbs blood from the affected area:

• Acute Stage: Blood is bright white on the scan (hyperdense).

• Subacute Stage (Days to Weeks): Blood starts to break down and becomes less dense, appearing more gray (isodense).

• Chronic Stage (Weeks to Months): The blood is almost completely reabsorbed, leaving a darker or empty space, sometimes filled with cerebrospinal fluid (hypodense), or a scar or calcification may form.

3. Implications of Bleeding and Resolution:

• The bleeding likely caused damage to surrounding brain tissue (e.g., pressure effects, inflammation, or tissue destruction).

• The decrease in white areas in the second scan suggests less active bleeding or resolved hemorrhage, but the affected brain tissue may now show changes like:

• Atrophy: Loss of tissue in the affected area.

• Scarring or Gliosis: The brain attempts to heal, which can result in fibrotic changes in the tissue.

• Encephalomalacia: Softening or loss of brain tissue due to injury.

4. Symptoms Related to the Bleed:

• The left-sided flexor posturing (decorticate posturing) could result from damage to specific brain regions (e.g., the motor cortex or pathways) caused by the hemorrhage.

• Dementia could be linked to the damage caused by the bleed or an underlying condition (like chronic hypertension or vascular disease) that made the bleed possible.

5. Ventricular Involvement:

• If the bleed extended into or near the ventricles, it might have affected cerebrospinal fluid dynamics, potentially contributing to hydrocephalus or other complications. In the second scan, the ventricles may appear more normalized as the bleed resolves.

Summary

The progression from more white (acute blood) to less white (resolving bleed) in the scans reflects the body’s natural healing process after a hemorrhage. However, the damage caused by the bleeding might have left lasting effects on her brain structure and function, which are likely contributing to her symptoms (e.g., dementia and posturing). These changes are why follow-up imaging and ongoing neurological care are crucial to managing her condition and optimizing her quality of life.