MRI Scanner - Four-Zone Boundary System

Due to the powerful magnetic field used by the MRI Scanner, many Magnetic Resonance Imaging (MRI) facilities and hospitals restrict access to the MR Suite by establishing four conceptual zones around the MRI scanner. Each boundary zone in this four-zone safety system is defined by its purpose and distance from the MRI scanner. Since the magnetic field extends in three dimensions, some zones may extend into other areas or floors of the facility.

Zone One consists of all areas freely accessible to the general public. This zone includes the entrance to the MR facility and the magnet poses no hazards in these areas.

Zone Two acts as a buffer between Zone One and the more restrictive Zone Three. Here, patients are under the general supervision of MR personnel. Normally, these areas are also safe from the powerful magnet. Zone Two may include the reception area, dressing room and interview room.

Access to Zone Three should be restricted by a physical barrier. Only approved MR personnel and patients that have undergone a medical questionnaire and interview are allowed inside Zone Three. The MR control room and/or computer room are located within Zone Three.

Zone Four is strictly the area within the walls of the MR scanner room, sometimes called the magnet room. Access into the MR scanner room should only be available by passing through Zone Three. Zone Four is sometimes considered to be inside of Zone Three because it does not have a direct entrance to unrestricted areas. Zone Three and Zone Four are sometimes collectively referred to as the MR Suite.

Inside the MR Suite is an invisible boundary defined by the magnetic field's five Gauss line. The five Gauss line is the point at which the magnetic field begins to affect electromagnetic devices, such as pacemakers. Because the magnetic field extends in all directions, the five Gauss line can also extend to areas outside of the MR Suite, including other floors, if the magnetic field is large enough. Magnetic fields cannot be seen or felt, so the five Gauss line is sometimes marked on floors or walls for safety. Marking the five Gauss line is particularly important when it extends beyond the walls of the MR scanner room.

Hospital and MR facility personnel that work near the MRI scanner must be aware of the powerful magnetic field and its associated hazards. For personnel not formally trained in a Radiology program, an MR safety program should be established for each individual facility. To supplement in-house safety training for those who work near the MRI Scanner, many modern, high-quality Level 1 MRI safety films are available.

Ode to "Scanner"

This scanner sings for YOU!!! Starring: HP ScanJet 5100c Guest Appearance: Brendan's hand. Actually, I am surprised this has so many veiws.

Care For Old Slides, Negatives, And Photos With PS 9700 Slide Scanner

Take care of your precious memories by using the PS 9700 is a standalone slide scanner to scan and digitize your slides, photos, and 35mm film and negatives that can be used with out the need for a computer. These photos and negative film can capture important moments in a person's life that will last a lifetime. Even though you try hard to keep these precious memories, there are some instances where they get damaged, torn, and even lost.

In my opinion, there are not many slides scanners out there that I can recommend that are high quality, easy to use, and less expensive except one. Even if the negatives are too old and impossible to process the traditional way, the innovative technology of the PS 9700 scanner does a great job.

This 3 in 1 scanner is used to digitize your photos, slides and old negatives. This innovative technology scanner is capable of producing high resolution 5 megapixel photos out of 35mm film. Your can store your images directly to your computer or any electronic storage device for the future.

These scanners are perhaps some of the most amazing discoveries of the new technological age, and are portable as well. Today, there are a number of 35mm scanners in the market which can make choosing the best one seem difficult. In order to choose the best one, you must compare the features and capabilities of the various 35mm film scanners that are available in the market.

One of the most popular scanners is the PS 9700 scanner. It is lightweight and portable and comes with a tray that makes preparing these precious photos very convenient. Images are immediately scanned as soon as the button is pressed. Unlike most other scanners, this SP 9700 scanner not only scans slides it also scans photos and negative film and has a resolution of 5 megapixel.

Processing your negatives, and photos are easy with the PS 9700 scanner. After you have removed your scanner from the box, plug the USB cable connected to the scanner into your computer. Take the 35mm slide or negative and place it into the tray provided with the scanner. Insert the slide tray into the scanner as directed in the scanner instructions. Press "scan" to scan your image and press "enter" to save your image and you are done. Repeat these steps until all the slides or negatives you want to convert to digital images are scanned.

If you are looking for an affordable quality slide scanners, the SP 9700 scanner is the perfect choice. Satisfied customers say this scanner scans images faster than most scanners and the images produced are at 3,600 dpi this high number helps make the scanner produces vivid and bright colors giving you better quality prints. You can use this scanner to do three jobs such as: scanning up to 5x7 prints, negative film, and mounted slides. Indeed, the PS 9700 scanners are one some of the most preferred scanners on the market today.

Marie Lieway is devoted to helping you convert your precious family memories into digital media. She is a great resource for slide scanners to help you preserve your negative films photos and slides. For more information, visit click here.

How To Choose A Barcode Scanner?

Barcode scanners are light emitting devices that are used to read barcodes. Usually attached to a computer or laptop via PS2 or RS-232, the data collected is stored on a computer for processing or storage. It is now used in many different industries such as retail or production.

They have been on the market for many years now with new versions of barcode scanners available every year. The prices can vary from as low as $50.00 to as high as several thousand dollars. So how do you pick a good barcode scanner?

To answer that question, it is important you know there are 2 major classes of barcode scanners, image-based and laser-based. Image-based barcode scanners use a camera usually embedded in a barcode scanner. The camera will capture the images and then processed by complex image techniques to decode the barcodes. Laser-based barcode scanners uses mirrors and lenses to read the barcodes.

Laser barcode scanners are usually more expensive than image-based scanners. They have their own pros and cons. An image-based barcode scanner do not have internal movable parts therefore are more resistant to drops or knocks than laser barcode scanners. Also, image-based barcode scanners have a shorter scanning distance (4 to 10 inches) compared to laser barcode scanners. On the other hand, laser scanners are more prone to wear and tear due to their lenses. They not only have a longer scanning distance (up to 24 inches) but also are able to scan from a wider angle from the barcode.

Be aware that the scanning distance for both image-based and laser barcode scanners have already improved dramatically over the years and I wouldn't be surprised if a barcode manufacturer claims an image-based scanner has a scanning distance of 24 inches.

Here are some questions you need to ask yourself before getting a barcode scanner. The size of scanner required? Type of environment the barcode scanner will be using (outdoors, shop, warehouse)? The scanning distance required? Are they to be used hands free or hand-held? Your budget?

So my suggestion is if you need a barcode scanner for long range scanning, get a laser barcode scanner. For short range scanning, use an image-based barcode scanner such as a CCD barcode scanner. The environment as I asked earlier also plays an important part. If the barcode scanner is being used outdoors or in rugged environments where it is expected to take a drop or knock or two, then it is best to get an image-based barcode scanner. If it were for example being used in a retail shop, then a laser barcode scanner would be the best choice.

There are such a wide variety of barcode scanners available that I just can't explain completely in this article. If you are in doubt, consult the barcode manufacturers such as symbol or metrologic who have sales consultants who are able to do an analysis of the type of barcode scanners needed by your business.

Ricky Lim is the owner of http://all-barcode-scanners.info. Visit his site for more barcode scanners reviews and recommendations