Category Archives: Uncategorized

Quantum model in radiology is what happens to an image when not enough X-ray photons make it to the imaging receptor. It creates a grainy image and is primarily the fault of not having a high enough mAs. When increasing mAs to help fix the quantum model, the radiologist must increase their exposure factors. ThisContinue reading “(Image Analysis) Quantum Model”

Go figure. . . X-ray is not the only modality in radiology, but it is the best! There are other modalities other than X-ray and some of the most common ones include computer tomography, magnetic resonance imaging, ultrasound, and PET scans. Each are unique and play a crucial role in diagnostic imaging. CT can createContinue reading “(Image Analysis) Other Modalities Image Differences”

At my clinical site, Jefferson uses the Philips brand for their X-ray tube. On it at the top left corner, there is a horse shoe that will light up whenever it is ready to take the exposure. Now what happens when your machine starts acting up? The first place that I go to is thatContinue reading “(Image Analysis) Trouble Shooting Equipment”

It is important that a radiology technologist takes steps before starting the exam to prep the patient. Prepping the patient is a step that will ensure the success of the procedures and enable the procedures to continue without having to halt or stop. This will decrease time spent on a procedure and increase efficiency. PreppingContinue reading “(Image Analysis) Impact of Patient Preparation”

Patient positioning is one of the most important things that separates a good technologist from a bad technologist. It is inevitable that a radiology technologist will get a patient that is unable to preform the different positions perfectly; however, it is our duty to ensure that the best positions possible are taken. This is importantContinue reading “(Image Analysis) Importance of Positioning”

One of the first things that affects an image exposure is attenuation. Attenuation is the concept of X-ray beams being absorbed completely and not making it to the image receptor. Attenuation can cause an image to not get the proper exposure that it needs in order to get a proper image display. One way toContinue reading “(Principals) Factors that Control Image Exposure”

Size and shape distortion can be created through a variety of different techniques. If you as a radiology technologist are not careful, you can create a visual of something that might not be true about a patient. For example, if you are not careful, an improper SID can create size distortion. This can be seenContinue reading “(Principals) Size vs. Shape Distortion”

Spatial resolution is the measurement of the smallest object that can be resolved by the sensor. It is also the level of resolution within an image. There are several aspects that can affect the level of spatial resolution of an image. The first one is the focal spot size, because when you increase the focalContinue reading “(Principals) Spatial Resolution”

The differences between short scale and long scale contrasts can be defined by the amount of different levels of gray. Long scale contrasts have more variety in their shades of gray, where as short scale contrast has more white and black and minimal shades of gray. When imaging a patient, the higher kVp you use,Continue reading “(Principals) Contrast Within X-ray Images”

There are three basic factors that you need in order to produce an X-ray. These are done through the actions of the anode, which is the positive side of the X-ray tube and the cathode which is the negative side of the X-ray tube. The first factor that you need is a source of electrons.Continue reading “(Principles) Principles that Enable X-ray Production”