The Quest to understand Long Covid and Blood Clots

Long Covid, characterized ⁢by persistent symptoms following an initial SARS-CoV-2 ‌infection, affects millions worldwide.​ ‍ Researchers are increasingly focused on the role of⁢ microclots – tiny blood clots – and larger pulmonary embolisms in the ⁣condition’s pathology. Investigations led by⁣ Dr. ‌Meenal‍ Wechalekar ⁢and her colleagues are specifically looking for these clots in the lungs of long Covid patients. Dr. Wechalekar is affiliated with University College London Hospital (UCLH) and is a consultant‍ respiratory physician.

The scanner’s ability to detect these clots is crucial, as traditional methods may miss smaller formations. The presence of these clots is hypothesized to⁤ contribute to the debilitating symptoms experienced by long‍ Covid sufferers, including fatigue, shortness of breath, and cognitive dysfunction.

How the CZT Scanner Works: A ​Technological Leap

The £1-million scanner operates by detecting gamma ⁣rays emitted by a radioactive substance ⁤injected into the⁢ patient. Though, its‍ key innovation lies in its use of Cadmium Zinc Telluride (CZT) technology. ​ This allows for a significant reduction in the ⁢amount of radioactive substance needed – approximately 30%, according ⁢to Dr. Wechalekar.This reduction in⁤ dosage⁣ is a major benefit for patient safety.

While ‌CZT detectors aren’t entirely new, ​the development of large, whole-body scanners like this one⁢ represents a recent advancement.CZT itself has been known ⁤for⁢ decades, but its manufacturing has historically been challenging. Arnab Basu, founding chief executive of Kromek, explains, “It has taken a long ‌time for it ⁤to develop into an industrial-scale production process.” Kromek is a UK-based company⁢ specializing in the⁢ development and manufacture of CZT detectors.

CZT functions as a semiconductor, capable of detecting photons in⁤ X-rays and gamma ⁣rays with exceptional precision.‍ This is⁣ analogous to the⁣ image sensor found in smartphone cameras, but far more specialized. when a high-energy photon strikes ⁣the CZT, it releases an electron, generating an electrical signal that forms the basis of ⁣the image. this is a more direct and⁢ precise process than older scanner technologies, which relied on a two-step conversion process.

Dr. Basu elaborates,‌ “It’s digital. it’s a single⁤ conversion step. It‍ retains all ⁣the ⁣critically importent details such as timing, the energy of the X-ray that is hitting the CZT detector ⁢–⁤ you can create color, or spectroscopic images.” Spectroscopic imaging provides more detailed information ⁣about the tissues being scanned, potentially aiding in more accurate diagnoses.

Implications for Long Covid Research and ​Beyond

The enhanced sensitivity and ⁢precision of the CZT scanner are expected to‌ accelerate research into long Covid and other⁤ conditions involving microclots or embolisms. ⁢ The ⁢ability to visualize these clots more clearly could lead to a better understanding of their formation, their impact on organ function, and the development of targeted therapies to dissolve or prevent ‍them.

Beyond long Covid,CZT technology has potential applications in various medical⁣ fields,including cancer detection,cardiology,and⁤ nuclear