CT Joints / Extremities



Surveillance of a CT examination by a doctor and a radiographer

CT examination

CT examination

CT examination

CT scan wrist joint

CT scan wrist joint

Computed tomography (CT) is an imaging method with the aid of x-rays, which makes it possible to depict a region of the body as non-overlapping layers.

During a CT examination, an x-ray tube and a recording system inside the machine’s casing rotate around the patient. The patient’s stretcher moves through the apparatus over the course of the examination.

The x-rays are weakened to varying degrees by your body structures (e.g. bones, muscles, organs, fat). The data acquired in this way are used to produce grey-scale images, the contrasting gradations of which represent the different tissues of the body. It is possible to produce image reconstructions on different spatial levels / in 3-D from the recorded data set. It is not necessary to carry out a further examination for this.

Our modern apparatus will help to keep your exposure to radiation as low as possible. Normally, patients will not be examined during pregnancy due to the x-ray radiation employed.



Preparation at home

Please do not eat anything for two hours before a CT examination of the joints or extremities (e.g. shoulder CT, knee CT, ankle CT).

Please bring with you:

  • A towel
  • A top (T-shirt) with no metal parts, e.g. appliquéd decoration
  • Existing examination results, where relevant (medical imaging, clinical examinations, operating theatre or discharge reports, lab results)


As a rule, claustrophobia is not a problem, as the examination apparatus is very short.



Prior to the examination you will be questioned about the medical history of your illness to date and your present symptoms. The doctor will also check whether there is a justifiable indication for the examination, i.e. whether the CT is medically useful and necessary.

Before the CT examination you must remove all moveable objects (e.g. jewellery and the like) from the area being examined, and false teeth must also be taken out. Depending on the region to be examined, you will be placed comfortably on the examination table, lying either on your back or your front.

The examination table will move back and forward through the computer tomograph several times during the examination. The apparatus is ca. 70 cm in diameter and also very short.

During the examination it is very important to lie absolutely still. Even the smallest of movements (e.g. forceful swallowing, coughing or such like) are sufficient to spoil our evaluation of the results measured.

Please follow instructions exactly, as these are very important for the quality of the images produced. You will be told how to breathe during the examination.

The staff will leave the examination room for the period of data recording, but they will keep in contact with you during the entire examination via loudspeaker and microphone. Should any problems arise, therefore, you can tell us at any time.

The examination takes only a few minutes, whereby the actual recording of data occurs within seconds.

Usually, you will be able to leave our practice immediately after the examination.

A detailed report with the results of the examination will be sent to the doctor who referred you to us. This will usually reach your doctor within a week: in case of medical necessity, it may also come at short notice on the same or the following day.