Breakthrough Test for Down Syndrome
    January 13, 2011
    Breakthrough Test for Down Syndrome

    A new technique could revolutionize the diagnosis of Down syndrome in a way that mothers will love. All it takes is 1/2 tsp of the mother's blood for stunningly accurate results. Then Not long ago the…

    Down Syndrome Testing and Vegetarians
    April 8, 2004
    Down Syndrome Testing and Vegetarians

    Pregnant women who are vegetarians may be unnecessarily worried by prenatal screening tests, according to a study from the Chang Gung Memorial Hospital in Taipei. The study followed the pregnancies of…

    Can She Hear Me?
    October 20, 2003
    Can She Hear Me?

    Most babies with hearing loss are not diagnosed until they are 1½ to 3 years old, unless a routine screening hearing test is done. These simple tests are recommended for all babies. However, about 1 …

    Cheap Genetic Testing At Home?
    August 25, 2003
    Cheap Genetic Testing At Home?

    A brilliant idea may bring expensive medical tests into reach using nothing more exotic than home computer with a CD drive. Up until now, many specific protein tests have relied on $100,000 fluorescen…

    X Ray or CT Scan
    March 11, 2003
    X-Ray or a CT Scan?

    Dr. Greene's Answer: I was taught as a pediatric resident that skull x-rays were obsolete, that if you were wondering about a fracture you should just get the CT to avoid exposing the child to radiati…

    Who Should Receive a CT Scan?
    March 11, 2003
    Who Should Receive a CT Scan?

    Dr. Greene's Answer: We want to CT children when the expected health benefit is clearly greater than the tiny increased risk of eventual cancer. To do this, we want to use other signs and symptoms to …

    Who are Radiologists?
    March 11, 2003
    Who are Radiologists?

    Dr. Greene's Answer: A radiologist is a physician who specialized in imaging techniques after completing medical school. If one is involved in doing or interpreting the CT scan, there is a higher chan…

    When Should a CT Scan be Preformed
    March 11, 2003
    When should a CT Scan be Performed?

    Dr. Greene's Answer: CT scans are usually the best imaging studies for looking inside the skull following head trauma. They are also the best imaging studies for other specific situations, including l…

    When Are MRIs Not Practical
    March 11, 2003
    When are MRIs not practical?

    Dr. Greene's Answer: The MRI is a very strong magnet -- you would not want it to move around metal clips in the head, or anywhere else in the body! Read More From This Series: CT Scan Defined CT Scan,…

    Other Radiation Exposures
    March 11, 2003
    Other Radiation Exposures

    Dr. Greene's Answer: Plain chest x-rays use a very low level of radiation (you get about the same level of background radiation every 3 days or so just from living on planet earth). Some types of x-ra…

    What is Ionizing Radiation
    March 11, 2003
    What is Ionizing Radiation?

    Dr. Greene's Answer: Ionizing radiation is radiation that produces ions when it interacts with matter -- it changes the structure of atoms. (more…)…

    Measures That Radiologists Should Adhere to When Administering a CT Scan
    March 11, 2003
    Measures That Radiologists Should Adhere to When Administering a CT Scan

    Dr. Greene's Answer: Minimize the number of CT scans. Radiologists should review the reasons given for any CT scan, and communicate well with the ordering doctor about other alternatives such as ultra…

    Questions to ask before every CT Scan
    March 11, 2003
    Here Are The Questions You Should Ask Before Every CT Scan

    Dr. Greene's Answer: CT's are wonderful, lifesaving technology, but as with antibiotics, it is wise to ask if there is a safe way to diagnose the situation without a CT. If a CT is recommended, it is …

    CT Scans and Radiation Exposure
    March 11, 2003
    CT Scans and Radiation Exposure

    Dr. Greene's Answer: A typical x-ray delivers 0.01 mSv (millisievert) of radiation. CT scans give us much more information, but they can also deliver as much radiation as getting 300 regular x-rays --…

    CT Scans and Cancer
    March 11, 2003
    CT Scans and Cancer

    Dr. Greene's Answer: In A-bomb survivors, the lowest exposure measured to increase cancer risk was about 50 mSv. Children who get a single head CT without a special pediatric setting get a dose of abo…

    CT Scans - Higher Risks in Children
    March 11, 2003
    CT Scans – Higher Risks in Children

    Dr. Greene's Answer: Radiation can certainly be harmful to adults as well. Unnecessary CT scans should be reduced at all ages, but this is especially important for children because children are far mo…

    CT Scan, Ultrasound or MRI?
    March 11, 2003
    CT Scan, Ultrasound or MRI?

    Dr. Greene's Answer: When the CT scan was first introduced in the 1970s it caused something of a revolution in medicine, allowing doctors to see the inner structure of the body in a way that had been …

    CT Scan Safety
    March 11, 2003
    CT Scan Safety

    Dr. Greene's Answer: A few months earlier, the National Cancer Institute had sent out a letter to physicians in an effort to decrease unnecessary CT scans in children. In the previous decade, the numb…

    CT Scan Risks
    March 11, 2003
    CT Scan Risks

    Dr. Greene's Answer: There is a tiny increased risk of cancer with each tiny increase in radiation exposure. These cancers are not found at the time of the CT scan, but decades later. Since so much ti…

    Alternatives to a CT Scan
    March 11, 2003
    Alternatives to a CT Scan

    Dr. Greene's Answer: Plain x-rays use low doses of radiation, but give limited information. Sometimes this limited information is exactly what is needed. What to do if more detail is needed? The CT sc…