About IndoseCT

IndoseCT 15.a is the first version of IndoseCT, while IndoseCT 20.b is the second version. IndoseCT was first developed in 2015. IndoseCT has been recorded in the Letter of Registration of Creation, Ministry of Law and Human Rights (Kementerian Hukum dan HAM), Republic of Indonesia, Number 000217029, on August 12, 2020.


IndoseCT is  software to calculate and manage the radiation dose of a patient undergoing computed tomography (CT) examination. It does not only calculate the radiation output dose of CT machines (in terms of volume CT dose index, CTDIvol), but also the individual dose received by each patient (in terms of size-specific dose estimate, SSDE) either based on the effective diameter (Deff) or water-equivalent diameter (Dw). This software can also calculate radiation output and patient dose for CT equipped with tube current modulation (TCM) technique.


Until 2011, CT doses had been expressed in terms of CTDIvol, whereas that metric is only able to quantify CT radiation output. The CTDIvol value is influenced by almost all input parameters, such as tube voltage (kVp), tube current (mA), rotation time (s), pitch, collimation width, and others. It was noted, since its introduction, that CTDIvol was not meant to indicate the radiation dose received by the patient. This is because the dose within each scanner is influenced by not only the radiation output from the CT machine, but also by the characteristics of the patient undergoing the examination, such as the size of the patient and the composition of the body part being examined. To quantify a patient’s radiation dose, the size-specific dose estimate (SSDE) was introduced.

IndoseCT software estimates the radiation dose directly for each individual patient using the patient’s image or by entering patient data manually. IndoseCT can also be used for the estimation of organ dose and effective dose. The effective dose is the dose commonly used to estimate the risk of developing cancer in the future from CT examinations. IndoseCT is also equipped with tools to store patient dosimetry data in a database. From this database, the software can process patient dosimetry data and easily display its graphs so that it becomes useful information for dose optimization for the use of ionizing radiation for stakeholders, whether for medical physicists, radiology doctors, hospital management or regulatory agencies.