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Molecular Computer Tomography realized October 23, 2008

Posted by tomography in CT, Innovation, PET, Tomography.
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Biograph_mCT_Internet.jpg

Siemens Healthcare introduced Biograph mCT at the European Association of Nuclear Medicine conference in Munich, Germany. The latest addition to their scanner line-up offers:

  • 5 minute whole body PET/CT scans with 2mm slice thickness
  • shorter scanning time
  • wider (78cm) ring diameter
  • low patient dose rate
  • up-to 128 slice CT scans

Further reading:

– Andras

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The whole brain Atlas March 17, 2008

Posted by tomography in CT, education, MRI, Nuclear Medicine, PET, Radiology, Tomography.
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This morning we’ve received a very helpful comment from Y.S., who is running a medical blog also, prep4md.blogspot.com. He suggested, to visit the site of Harvard Medical School. The library I could explore there was amazing to me.

In The Whole Brain Atlas you can view MRI sections through a living human brain as well as corresponding sections stained for cell bodies or for nerve fibers. The stained sections are from a different brain than the one which was scanned for the MRI images…

foramen monro

A great collection to explore neuroimaging for students and even for MDs. In the Normal brain section you can set slice, anatomical structure, choose between MRI T1 or T2 and even PET. There are some Quicktime motion pictures eg of vascular anatomy. Diseases are sorted, so you can study these separative groups: Cerebrovascular, Neuroplastic, Degenerative and Inflammatory or Infectious disease.

MRIs are allowed anyone to use them with no restrictions as long as you mention their source. Therefor the Copyright information:

All of the images on this site are copyrighted. They were produced with the support of public funds, and we wish to keep them available for public use. You may use them for any purpose which will not interfere with their use by others. We do ask that you SECURE OUR PERMISSION, so that we can track the uses being made.

There is no charge for the permission nor for the use of the images. The permission process is important for our guidance in producing additional images and also for maintaining our public support. We also ask that you credit this site as the source of the image(s), and the National Science Foundation for its support.

Thank you for the tip Y.S!

-Imre

Flick’r misses tomography February 29, 2008

Posted by tomography in CT, MRI, Off Topic, Radiology, Tomography, web 2.0, X-ray.
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We’ve been posting some really great tools (this and this too -András’s great collection) you can use at your work. One of them was Flick’r, so it’s not the first time you can read about it on our blog, and I’m sure it’s not the last. Surfing this huge base of pictures, I was searching for any groups dealing with radiology or nuclear medicine.

The best way to store, search, sort and share images.

flickr logo

Honestly I wasn’t that successful. Xray is quite popular, but no PET, SPECT images. I think doctors haven’t discovered the great potential, Flick’r provides, yet.

Here are some examples on Flickr Groups about radiology:

  • RadsWiki made by a radiology residental in NYC and the webmaster of for his radiology wiki
  • Nasty xray
  • Real radiology A great radiology group with more than 450 photos detailed!
  • Orthopaedic image library The name tells what it’s about.
  • MRI
  • Tomography Tomographic images of any kind, including but not limited to MRI, PET, and plain old X-ray CT. Photos of the equipment and people used to make the images is fine in limited amounts, but the main focus is the tomographic images.
  • Biopsy Feel free to add imaging of any radiology-guided biopsy procedure.
  • The Bassett Collection: The Basset Collection, which now belongs to Stanford University’s School of Medicine, is the definitive dissection collection available to medical students and instructors. These incredibly detailed dissections show and label most every part of the human body, from its tiniest veins, arteries and nerves to serial cross-sections of the spinal cord.

Hopefully, the number of pictures about radiology or even nuclear medicine will grow exponentially in the near future e.g. at Flickr. It would be useful for students as well, as they cannot always go and see these pics.

-Imre

    Colour X-ray December 8, 2007

    Posted by tomography in development, Off Topic, Radiology, Tomography, X-ray.
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    Scientists at The University of Manchester have developed a new x-ray imaging technique. This new method aims to create colour x-ray pictures 3D. The new technique developed by the Manchester team is called tomographic energy dispersive diffraction imaging (TEDDI). It requires a synchrotron radiation white X-ray source so it is capable of producing structure composition profiles with resolutions approaching 1 micron. Such a facility would be ideal for studying a whole range of problems in materials and engineering science.

    spacexray

    Current imaging systems such as spiral CAT scanners do not use all the information contained in the X-ray beam. We use all the wavelengths present to give a colour X-ray image. This extra information can be used to fingerprint the material present at each point in a 3D image. – says Professor Cernik

    Nice expectations on biomaterials. Distinguishing normal tissue from abnormal.

    We have demonstrated a new prototype X-ray imaging system that has exciting possibilities across a wide range of disciplines including medicine, security scanning and aerospace engineering.

    Yet the problem is time. To create a scan takes hours, but scientists believe that it will be reduced to just a few minutes. The method could be useful in specific tissue identification in humans or even identifying heroin, cocaine in freight; or could be useful at car and aerospace engineering showing whether welds are damaged or have too much strain. So reaching the medical line is not that close, but what is late does not go by.

    Think small December 1, 2007

    Posted by tomography in development, Off Topic, Tomography.
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    A remarkably simple experiment devised by scientists yields important information about the mechanical properties of thin films (nanoscopically thin layers of material that are deposited onto a metal, ceramic or semiconductor base)

    starburstThe findings impact a broad range of scientific disciplines and applications, from cosmetics to coatings, to micro- and nanoelectronics, filters, very low loss high density optical films etc. Understanding the mechanical properties of thin films is essential to their performance and optimization.

    Until now, determining the mechanical properties of these thin films was either an expensive and time-consuming endeavor, requiring powerful microscopes to view the films, or scientists examined composite structures and made uncertain assumptions. This new research will give scientists a simple way to access the material properties of most thin films. Low-power optical microscope is used to observe what happens when they place a tiny drop of water on thin film as it floats in a Petri dish of water. The capillary tension of the drop of water produces a starburst of wrinkles in the film. The number and length of the wrinkles are determined by the elasticity and thickness of the film.

    In some of the materials studied, the wrinkles in the ultrathin polymer films vanished with time. This vanishing provides insight into the relaxation process of an ultrathin film by yielding information on the way polymer chains move in the highly confined geometry.

    Source: NSF

    X is for Ray November 8, 2007

    Posted by tomography in development, Off Topic, Radiology, Tomography.
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    wilhelm

    This day – Nov. 8. – in 1895, german physicist Wilhelm Roentgen is working in his laboratory in Würzburg when he accidentally discovers the X-ray.

    Roentgen was conducting experiments with a Crookes tube — basically a glass gas bulb that gives off fluorescent light when a high voltage current is passed through it — when he noticed that that the beam cast a greenish fluorescent light on a screen nine feet away, despite the tube being shielded by heavy black cardboard.

    Roentgen concluded, correctly, that he was dealing with a new kind of ray, one that cast the shadow of a solid object when passed through an opaque covering from its point of origin. Not knowing what kind of ray he was dealing with, exactly, led him to call it an X-ray. The name stuck.

    This “X” earned him a noble prize in physics in 1901.

    source: wired.com

    Head-ready EEG systems November 5, 2007

    Posted by tomography in development, EEG, Tomography, What tomorrow brings?.
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    IMEC has developed a 2-channel wireless EEG (electroencephalography or monitoring of brain waves) system powered by a thermo-electric generator. It uses the body heat dissipated naturally from the forehead. The wearable EEG system operates completely autonomous and maintenance-free with no need to change or recharge the batteries.wear-eeg

    The entire system is wearable and integrated into a headband. The small size, low power consumption of only 0.8mW and autonomous operation increase the patient’s autonomy and quality of life. Potential applications are detection of imbalance between the two halves of the brain, detection of certain kinds of brain trauma and monitoring of brain activity.

    A low-power digital signal-processing block encodes the extracted EEG data which is sent to a PC via a 2.4GHz wireless radio. The whole system consumes only 0.8mW. The thermoelectric generator is mounted on the forehead and converts the heat flow between the skin and air into electrical power. The generator is composed of 10 thermoelectric units interconnected in a flexible way. The EEG system is operational in less than one minute after switching on the device!

    The system is a tangible demonstrator of the Human++ strategic research program researching healthcare, lifestyle and sport applications of body area networks.

    Human ++ research aims:

    • increase the lifetime of battery-powered devices
    • increase the lifetime between sensors and actuators
    • add intelligence to the devices
    • extend devices with chemical and biological features
    • integrate and package heterogeneous components
    • fundamentally understand measuring medical phenomena
    • develop biocompatible systems

    Starfleet TRICORDER? November 1, 2007

    Posted by tomography in Cancer, CT, development, Future, Tomography, What tomorrow brings?.
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    Two recent scientific discoveries mark the latest steps toward the ultimate medical-diagnosis technology: the tricorder. Bones McCoy made Star Trek‘s portable black box famous by using it to diagnose ailments without ever touching a patient. Now, studies show that the tricorder is closer to becoming reality. Scientists have been trying to construct a tricorder-like device for years, but no one has managed to pack all the functions of a true tricorder — point, pull a trigger and diagnose — into one hand held unit.

    tricorder

    Well, it’s not just science fiction any more — we could see such a contraption, thanks to the USA army and the Defense Advanced Research Projects Agency (DARPA). This high priority program is to save lives(mainly military yet) of blood loss through the development of a portable system that will automatically locate and noninvasively treat bleeding vessels in arms and legs. The envisioned system uses advanced diagnostic ultrasound techniques with automated control to locate the bleeding and to direct the delivery of High Intensity Focused Ultrasound (HIFU) energy to the target site to stop the bleed.

    Combining the technologies into one compact box may take decades. But the two latest discoveries offer incremental advances in diagnostic medicine — pointing toward more portable and less invasive medical technologies.

    labonchipSeveral lab-on chip technologies have brought diagnosis to hand helds, but they still require a tissue sample. Chang and his co-authors have linked visible patterns in CT scans of liver-cancer patients with cancer-gene activity. – Like if imaging the human genome in their tumor. – For example, the scientists could determine whether the gene that spurs the growth of blood vessels (VEGF-vascular endothelial growth factor), was turned on or off, by statistically analyzing a CT image. Experimental treatments such as vaccines and gene therapies attack tumors by shutting down this gene’s ability to feed cancer tumors with new blood vessels. Instead of taking an invasive biopsy that could put sick patients at risk, a noninvasive CT scan could determine the activity of VEGF and many other genes.

    In the other research, scientists have developed a compact, precision-magnetic microscope based on a new state of matter. The technology, the researchers said, is as effective as current imaging devices such as MEGs (magnetoencephalography) for the brain and MCGs (magnetocardiography) for the heart, which require a hospital visit because the devices are large and expensive. It’s made possible by a state of matter called the Bose-Einstein condensate (or if you have some more time, here I liked this one). becPhysicists at UC Berkeley have developed the device by harnessing a special property of Bose-Einstein condensates: Because they are cooled close to absolute zero, they are as free of vibrations and thermal noise as a quantum system can be, and are thus like a quiet, acoustically pristine concert hall. Tiny magnetic fields that might be unobservable in other systems are easily picked up.

    “As with all new technologies, unexpected vistas might open.” – Dmitry Budker

    Likely to hear some news in the near future! 🙂

    sources – wired.com, smarteconomy, BEC homepage