diff --git a/src/04-modality-specific-files/09-positron-emission-tomography.md b/src/04-modality-specific-files/09-positron-emission-tomography.md
index 1d2b45dd74..1511e01057 100644
--- a/src/04-modality-specific-files/09-positron-emission-tomography.md
+++ b/src/04-modality-specific-files/09-positron-emission-tomography.md
@@ -213,7 +213,7 @@ We refer to the common principles for the standards for describing dates and tim
 | ScaleFactor                          | RECOMMENDED           | [array][] of [numbers][]               | Scale factor for each frame.                                                                                    |
 | ScatterFraction                      | RECOMMENDED           | [array][] of [numbers][]               | Scatter fraction for each frame (Units: 0-100%).                                                                |
 | DecayCorrectionFactor                | RECOMMENDED           | [array][] of [numbers][]               | Decay correction factor for each frame.                                                                         |
-| DoseCalibrationFactor                | RECOMMENDED           | [number][]                             | Value used to calibrate radioactivity count, i.e. transfom to meaningful unit (e.g. Becquerel) - value already applied to the data as a multiplication factor that scales them from counts/sec to Bq/ml (dicom tag 0054,1322). |
+| DoseCalibrationFactor                | RECOMMENDED           | [number][]                             | Value used to calibrate radioactivity count, i.e. transform to meaningful unit (e.g. Becquerel) - value already applied to the data as a multiplication factor that scales them from counts/sec to Bq/ml (dicom tag 0054,1322). |
 | PromptRate                           | RECOMMENDED           | [array][] of [numbers][]               | Prompt rate for each frame (same units as `Units`, for example, `"Bq/mL"`).                                     |
 | RandomRate                           | RECOMMENDED           | [array][] of [numbers][]               | Random rate for each frame (same units as `Units`, for example, `"Bq/mL"`).                                     |
 | SinglesRate                          | RECOMMENDED           | [array][] of [numbers][]               | Singles rate for each frame (same units as `Units`, for example, `"Bq/mL"`).                                    |