What to look at when reading your test result

The value of a test lies not in the number it produces on its own, but in having been requested for the right reason and read correctly. Imaging ordered without cause costs both time and dose; a test that is skipped leaves the picture incomplete. So at every visit we first make the question clear, then plan the test around it.

The sections below gather the points people ask about most often at the preparation and result stages. Even so, every picture is particular; a definite assessment is made together with clinical interpretation.

Getting ready

Your booking confirmation sets out, in writing, the fasting, medication and clothing rules for the test chosen. Water is allowed where fasting is required; always speak to your doctor before stopping any regular medication.

For imaging, earlier scans are of real value for comparison. If you have previous reports and images, we ask you to bring them; if not, to tell us which centre carried them out.

What to pay attention to

• Telling us before the scan if there is any chance of pregnancy.
• Sharing the presence of a pacemaker, implant, stent or surgical clips when booking.
• Noting the time of your last meal where fasting is required.
• Having current kidney function values if contrast is to be used.

Reading the result

Laboratory reports show the method and the reference range alongside the measured value. A value outside the range is not a diagnosis on its own; it is weighed against the clinical picture, earlier measurements and, where needed, a repeat sample.

The information in this article is for general guidance and does not replace a clinical assessment. The right reading of your own result becomes clear in conversation with the doctor who requested it.