Questions tagged [medical-imaging]
The medical-imaging tag has no usage guidance.
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Why are the radiation doses of dental CBCT scan in mGy/cm2 rather than microsievert?
I asked my dentist the radiation dose of a CBCT scan and the machine gives the data in mGy/cm2.
I was rather used to interpret radiation doses in micro-Sivert because this unit takes into account the ...
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What tools (high and low tech) can be used to find a foreign body (eg a splinter)?
What are some tools that can be used to find a finding the exact location of a foreign body object inside someone?
I'm interested in both:
Low-tech tools that almost everyone in the world either [a] ...
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Where can I find a list of MRI scanners ordered by the quality of the images they take?
I'd like to have a list of MRI scanners ordered by the quality of the images they take. The number of teslas is one parameter, but among MRI scanners with the same number it teslas, I'm told the image ...
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How accurate is reflectance confocal microscopy (RCM) to predict whether a basal cell carcinoma (BCC) is infiltrative or superficial?
Reflectance confocal microscopy (RCM) is a noninvasive imaging technique that has been used to diagnose basal cell carcinoma (BCC). How accurate is RCM to predict whether a BCC is infiltrative or ...
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What is meant by "attraction range" in image similarity?
I am reading this article about measuring similarity between x-rays and DRR's (2d projections from CT) and the article speaks about different measurement techniques accuracy vs. attraction range.
I ...
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Can lung imaging uniquely identify coronavirus-induced pheumonia?
How reliable are radiographic, CT and ultra-sound appearances of coronavirus in the lungs in terms of their sensitivity/specificity? A bunch of imaging labs popped up in my town recently, all of them ...
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Commonalities & Differences between these Scans for Knee Joint?
Commonalities & Differences between these Scans for Knee Joint?
MRI Scan Knee Joint
MRI Scan Knee Arthrography
MRI Scan Knee Joint Contrast (Fasting Reqd)
MRI Scan Knee with Cartilage Mapping
(...
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How are CT scans (perfusion maps) produced?
I am given different CT perfusion maps like cerebral blood flow (CBF) or mean transit time (MTT). Given these 3D images, I have to produce predictions using machine learning algorithms.
Can you ...
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Why do water molecules diffuse along axons direction? [closed]
I am studying tractography technique which aims to reconstruct bundles of axons in brain by following the diffusion direction of water. It exploits the difference between grey matter and white matter: ...
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Bulbus aortae is a part of aortic root, then where are the two measurements taken?
I would like to clarify my understanding because anatomy atlases do not provide me an explanation. As far as I know, the aortic bulbus is a part (the widest, the sinuses of Valsalva) of the aortic ...
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Is it typical for US doctors to be in the room and participating in their patient's CT Scan, MRI, etc?
I am sure we have all seen US TV shows where a patient needs a scan of some sort. The star doctor, often two of them so they can have dialog, is shown looking at a screen live while the scan proceeds, ...
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Is ultrasound more subjective than X-ray?
There is some discussion on Ultra-sonic vs X-ray about ultrasound interpretation being more subjective than X-ray findings. Possible sources of ultrasound image quality variation might be the skill of ...
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Ultrasound vs X-ray [closed]
It might be that this is more a physical question but as the application is medical I firstly want to adress it here:
What are the limits of ultra-sonics in regard to diagnosis respectively why are x-...
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Time necessary between two consecutive head CTs
A patient (male, 39) who has had head trauma and reports light headaches and strong tinnitus has had a brain CT scan done soon after symptom onsets (but 5 weeks after the trauma). No contrast agent ...
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What does "cell analysis" mean in terms of medical imaging technique?
A paper says
To validate the effectiveness of using A-GAN for data augmentation, we assessed its performance on cell analysis in adaptive optics retinal imaging, which is a rapidly-changing medical ...
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What is "adaptive optics retinal imaging"?
A paper says
To validate the effectiveness of using A-GAN for data augmentation, we assessed its performance on cell analysis in adaptive optics retinal imaging, which is a rapidly-changing medical ...
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COVID-19: Medical imaging recommendations from Asia
Since the demand for imaging is increasing regarding COVID-19 and the number of papers describing COVID-19 patterns in computed tomography (CT) is increasing, I searched medical imaging ...
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Meaning of "acquisition in a single volume" (CT scanning)
From a research paper: (Richards, et al. 2018).
A number of integrated strategies were used to achieve this consistently low dose, including; prospective ECG-gated acquisition, lowest possible tube ...
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Where is a CT scan better than an MRI, where is an MRI better than a CT scan, and where is an ultrasound better than the first two? [closed]
I've always assumed that a CT scan is better at "hard" objects, while an MRI is better at "soft" objects, but then I heard that CT scans (even without contrast) can be used to ...
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RTG Pisiform Fracture or Noise
While looking at the RTG images of pisiform fractures I find it really hard to distinguish between noise and hairline fractures.
The region in question is marked with the red arrow. What are your ...
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When is an MRI also an MRN?
I'm not a medical professional. I have just noticed the mention of MRN - Magnetic Resonance Neurography as a diagnostic tool for nerve issues.
Now, I know that MRN is essentially a kind of MR ...
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DICOM SliceThickness proximity
I do have DICOMs (Digital Images and COmmunications in Medicine) from several CT volumes where most volumes miss the SliceThickness and SliceLocation attribute.
Is there another attribute usually ...
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How important is the experience of the radiologist to diagnose a tendinopathy when reading an MRI?
I read on {1}:
Preoperative ultrasound examination of the shoulder permits a reliable diagnosis of complete rotator cuff tears and calcium deposits (calcific tendinitis). The method is less ...
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Is a CT scan specific to an organ?
Is a CT Scan specific to an organ?
What I mean by that question is the following: if you google a bit you will often find list with radiation exposure due to the CT scan, see for example here. In ...
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Is it possible to approximate through medical imaging how old a tendinopathy is?
Is it possible to approximate through medical imaging how old a tendinopathy is?
My unsuccessful search so far:
"tendinopathy age imaging" on https://scholar.google.com and https://www.ncbi.nlm.nih....
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What does the intensity in an MR image represent?
Hounsfield units are frequently used as intensity for CT images.
What is used for MR images?
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Machine learning for medical image scanning
I'm searching for a topic of interest in the domain of machine learning and computer vision. More specifically, researching can computer vision be applied to classify medical image scans and/or ...
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Why is the Doppler angle setting supposed to be 60 degrees for arteries but 0 degrees for veins? [closed]
In ultrasonography, why isn't the Doppler angle correction supposed to be 60 degrees for veins just like it is for arteries?
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Alternative Imaging Method for Renal Contrast Media
The background of this research isn't important, so I won't waste time on it.
For a portion of my research, I need to assess the capabilities of certain substances as renal contrast agents [basically ...
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What are the definitions of Time to Peak, Cerebral Blood Flow and Mean Transit Time?
I am trying to compute Time to Peak, Cerebral Blood Flow (CBF) and Mean Transit Time (MTT) maps in brain CT imaging. I tried to find the definitions or some articles but I am not from the medical ...
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Looking for MRI file repository for Finite Element Modeling of ACL
Does anyone know of any online/open access MRI image collections? I am looking for 3D geometry for an ACL to mesh and model for a Finite Element Modeling course, and I'm having trouble locating source ...
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What is the dynamic range on a film-based x-ray?
As the title asks, what is the dynamic range on a film-based x-ray? And what are the implications of this for digitally stored x-ray images?
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Medical Images and workflow
What is the general workflow involved in managing images such as X-ray, scan etc in a day to day job of a healthcare-technician or a doctor?
I am interested to know more about how these images are ...
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Are there any real-world application in a bone fracture detection program?
Sorry if I'm asking in the wrong community, but here's where I think I can reach more people in the medical field.
I am in engineering, for a project in my uni, I thought of doing a research on ...
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List of Organs by Vascular Density?
Could anyone please give me a list of the major organs in the human body with their vascular densities? 3D models and pictures of such are available, but calculating how much which organ has is very ...
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Reading radiology reports: What do two numbers separated by a slash mean?
The following is an excerpt from the "findings" section of an MRI radiology report. What do the instances of two numbers separated by a slash mean?
There is a lesion within the spinal canal at T2-3 ...
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What are the upsides of performing a laryngoscopy through the nose (a.k.a. nasolaryngoscopy) instead of a laryngoscopy through the mouth?
I read on https://medlineplus.gov/ency/article/007507.htm (mirror):
Laryngoscopy may be done in different ways:
Indirect laryngoscopy uses a small mirror held at the back of your throat. ...
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Ultra Sound Gender Prediction Accuray
Sorry for a very basic Question (as I am a software engineer) but I am confused after getting material from internet about accuracy of Ultra Sound Gender prediction
Question: How much this is likely ...
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Derive radiation exposure from DICOM files
DICOM files (e.g. from CT scans) contain raditation related data. I think this is the relevant section in the standard.
Here's an excerpt from such a DICOM file:
(0018, 0022) Scan Options ...
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Number of MRI scanners in the world today?
How many MRI scanners are there today in the whole world? My own search only revealed numbers in certain countries but no overall count.
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MR scanner versus MRI scanner
To designate a device that performs magnetic resonance imaging (MRI), is the proper term MR scanner or MRI scanner?
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Does the number of teslas matter when evaluating a tendinopathy with an MRI scanner?
The number of teslas in MRI scanners vary between 0.2 and 7 teslas, and sometimes even up to 10.5 Teslas (Siemens MAGNETOM 10.5T) and 11.7 teslas (Siemens MAGNETOM 11.7T).
Does the number of teslas ...
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How can an MRI influence the treatment in case of an elbow tendinopathy?
I wonder what findings in an MRI may influence the treatment in case of an elbow tendinopathy. I have noticed that a fair amount of physicians (at least in the United States and in France) are ...
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How can I measure my tendon length?
I read on Wikipedia's page on tendon (mirror):
Tendon length varies in all major groups and from person to person.
How can I measure my tendon length?
I am mostly interested in the tendons that ...
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Which medical imaging procedures allow to see a tendon's extracellular matrix?
I wonder which medical imaging procedure allows to see a tendon's extracellular matrix. I am mostly interested in the lateral epicondyle of the humerus. The purpose is diagnosing the nature, the ...
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Is increased blood flow always correlated with increased cerebral activity?
I've heard that cerebral fMRI (Functional magnetic resonance imaging) maps blood flow through the brain, and it is most of the time correlated with cerebral activity. What are the factors that can ...
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Medical imaging - image quality?
Are there any resources or literature that spell out the factors affecting image quality for each of the main imaging techniques or can someone provide such a list?
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CT scan software [closed]
I'm looking for software (free or budget) to analyze CT scans of pigs. I need to find the volume of the lungs, in normal situations and during pneumothorax (laprosopic surgery). The problem I'm having ...
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Can MRI scans be dangerous for one's health?
Can MRIs have any deleterious effect on one's health? Or would it be safe to have say 5 MRIs per year?
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