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I revised malfunction.

App Description

DT Calculator, jointly developed with a medical doctor, is an application to calculate a tumor doubling time, which is an indication of a growth speed of a cancer.
The tumor doubling time is the putative period of time required for a quantity of cancer cells to double. Namely, the shorter doubling time suggests the faster proliferation of the cancer cells. On the contrary, the longer doubling time suggests the slower proliferation.
By entering two dates and results of examinations, you can calculate the doubling time. The required results of examinations are values of a tumor markers and/or maximum diameters (tumor sizes), both of which are supposed to be related to the number of cancer cells.

[Main Features]
1. Sixteen tumor markers are initially registered. They are the tumor markers frequently used (AFP, CA125, CA15-3, CA19-9, CA602, CEA, CYFRA, hCG, IL2-R, NSE, PIVKA-II, ProGRP, PSA, SCC, SLX, STN).
You can change the reference values of the tumor markers, because there are variations among hospitals.
2. Adding a new tumor marker: in addition to the initially registered markers, you can add a new tumor marker.
3. Calculating the tumor volume doubling time: in addition to calculating from the doubling time of tumor markers, you can calculate tumor volume doubling time by selecting maximum diameter (a size of tumor). Maximum diameter can be applied to many kinds of solid cancers.
4. Estimating next examination value: if you input a scheduled examination date, you will know the predicted next examination value calculated from the current data.
5. Sending an e-mail: you can send calculation results to the specified address through e-mail.

We have also released "DT Calculator Free" and "DT Calculator Lite". These have limited functions in comparison to the full version.
Please choose one of your favorite.

Calculating Tumor Doubling Time.
1. Select a tumor marker at First Screen. You can choose up to four markers at the same time.
2. Touch [Done] button to move to Input Screen.
3. Input two dates and values of tumor markers and/or maximum diameter.
4. Touch [Next] button and input all the data required on the Screen.
5. Touch [Calc] button to move to Result Screen, where you can see the calculation result.

Sending Calculation Result through e-mail
1. Input your e-mail address at First Screen. But if you haven't set the email config of iPhone, the input space will not be displayed.
2. Calculate the doubling time and move to the Result Screen, as explained at "Calculate Tumor Doubling Time".
3. Touch [Send e-mail] at Result Screen to move to e-mail transmitting screen. If you have input a memo into a space for the memo, that will be reflected in the mail body.

Changing Reference Value
1. Touch [Tumor marker settings] to move to Config Screen.
2. Select a tumor marker from the list and edit the reference value.
3. The edited value will be saved, when you move to another screen.

Displaying only frequently used tumor markers
1. Touch [Tumor marker settings] at First Screen and touch [Set favorite tumor marker] at the next screen.
2. Select Tumor Markers, which you want to display at First Screen and the next screen. When you touch [?] button on the left of the screen, a description of the tumor marker is displayed.
3. The edited value will be saved, when you move to another screen.

Adding a tumor marker
1. Touch [Tumor marker settings] at First Screen and touch [Set favorite tumor marker] at the next screen.
2. Touch [+] button to move to the newly registering screen.
3. Input a name, a reference value and a unit of new tumor marker. Touch [Save] button to register the marker.
*Tumor Markers registered by user are always displayed.

Please use this application as a guide to obtain a rough image of the growth speed of the cancer, and use in consultation with a specialist, if you use this application at the actual clinical settings.

iPhone Screenshots

(click to enlarge)

DT Calculator Full screenshot 1 DT Calculator Full screenshot 2 DT Calculator Full screenshot 3 DT Calculator Full screenshot 4 DT Calculator Full screenshot 5

App Changes

  • March 31, 2013 Initial release
  • April 28, 2013 New version 1.1
  • November 15, 2013 New version 1.3
  • June 17, 2015 New version 1.4

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